Clean up links to docs website (flutter#177792)

- remove link without use (PowerShell version minimum not reached, this
is not mentionned anywhere in Windows installation / troubleshooting
documentation)
- clean up API docs root
- clean up app template links, add `Learn Flutter` link
- update get started links
- replace `flutter.dev/docs` with `docs.flutter.dev`
- fix embedder descriptions
- fix broken API `docs.flutter.io` links
- http → https 
- remove `/install` from `/get-started` links
- fix Android Studio link

## Pre-launch Checklist

- [x] I read the [Contributor Guide] and followed the process outlined
there for submitting PRs.
- [x] I read the [Tree Hygiene] wiki page, which explains my
responsibilities.
- [x] I read and followed the [Flutter Style Guide], including [Features
we expect every widget to implement].
- [x] I signed the [CLA].
- [ ] I listed at least one issue that this PR fixes in the description
above.
- [x] I updated/added relevant documentation (doc comments with `///`).
- [x] I added new tests to check the change I am making, or this PR is
[test-exempt].
- [x] I followed the [breaking change policy] and added [Data Driven
Fixes] where supported.
- [x] All existing and new tests are passing.

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on [Discord].

**Note**: The Flutter team is currently trialing the use of [Gemini Code
Assist for
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<!-- Links -->
[Contributor Guide]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#overview
[Tree Hygiene]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md
[test-exempt]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#tests
[Flutter Style Guide]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Style-guide-for-Flutter-repo.md
[Features we expect every widget to implement]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Style-guide-for-Flutter-repo.md#features-we-expect-every-widget-to-implement
[CLA]: https://cla.developers.google.com/
[flutter/tests]: https://github.com/flutter/tests
[breaking change policy]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#handling-breaking-changes
[Discord]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Chat.md
[Data Driven Fixes]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Data-driven-Fixes.md

---------

Co-authored-by: Parker Lougheed <parlough@gmail.com>

Author: guidezpl

.github/ISSUE_TEMPLATE/01_activation.yml

@@ -22,7 +22,7 @@ body:
       value: |
         Before filling the form fields, please consider the following:
         - Ensure that you have searched the [existing issues](https://github.com/flutter/flutter/issues)
-        - Read the [guide to filing a bug](https://flutter.dev/docs/resources/bug-reports)
+        - Read the [guide to filing a bug](https://docs.flutter.dev/resources/bug-reports)
   - type: textarea
     attributes:
       label: Steps to reproduce

.github/ISSUE_TEMPLATE/02_bug.yml

@@ -19,7 +19,7 @@ body:
       value: |
         Before filling the form fields, please consider the following:
         - Ensure that you have searched the [existing issues](https://github.com/flutter/flutter/issues)
-        - Read the [guide to filing a bug](https://flutter.dev/docs/resources/bug-reports)
+        - Read the [guide to filing a bug](https://docs.flutter.dev/resources/bug-reports)
   - type: textarea
     attributes:
       label: Steps to reproduce

.github/ISSUE_TEMPLATE/03_feature_request.yml

@@ -17,7 +17,7 @@ body:
       value: |
         Before filling the form fields, please consider the following:
         - Ensure that you have searched the [existing issues](https://github.com/flutter/flutter/issues)
-        - Read the [guide to filing a bug](https://flutter.dev/docs/resources/bug-reports)
+        - Read the [guide to filing a bug](https://docs.flutter.dev/resources/bug-reports)
   - type: textarea
     attributes:
       label: Use case

.github/ISSUE_TEMPLATE/08_first_party_packages.yml

@@ -18,7 +18,7 @@ body:
       value: |
         Before filling the form fields, please consider the following:
         - Ensure that you have searched the [existing package issues](https://github.com/flutter/flutter/issues?q=is%3Aopen+is%3Aissue+label%3Apackage)
-        - Read the [guide to filing a bug](https://flutter.dev/docs/resources/bug-reports)
+        - Read the [guide to filing a bug](https://docs.flutter.dev/resources/bug-reports)
   - type: dropdown
     id: packages
     attributes:

.github/ISSUE_TEMPLATE/10_google3_bug.yml

@@ -21,7 +21,7 @@ body:
       value: |
         Before filling the form fields, please consider the following:
         - Ensure that you have searched the [existing issues](https://github.com/flutter/flutter/issues)
-        - Read the [guide to filing a bug](https://flutter.dev/docs/resources/bug-reports)
+        - Read the [guide to filing a bug](https://docs.flutter.dev/resources/bug-reports)
   - type: markdown
     attributes:
       value: |

README.md

@@ -22,8 +22,8 @@ open source.
 
 ## Documentation
 
-* [Install Flutter](https://flutter.dev/get-started/)
-* [Flutter documentation](https://docs.flutter.dev/)
+* [Install Flutter](https://docs.flutter.dev/get-started)
+* [Flutter documentation](https://docs.flutter.dev)
 * [Development wiki](./docs/README.md)
 * [Contributing to Flutter](https://github.com/flutter/flutter/blob/main/CONTRIBUTING.md)
 

bin/internal/shared.sh

@@ -237,7 +237,7 @@ function shared::execute() {
     >&2 echo "Error: The Flutter directory is not a clone of the GitHub project."
     >&2 echo "       The flutter tool requires Git in order to operate properly;"
     >&2 echo "       to install Flutter, see the instructions at:"
-    >&2 echo "       https://flutter.dev/get-started"
+    >&2 echo "       https://docs.flutter.dev/get-started"
     exit 1
   fi
 

bin/internal/update_dart_sdk.ps1

@@ -30,7 +30,6 @@ $psMajorVersionRequired = 5
 $psMajorVersionLocal = $PSVersionTable.PSVersion.Major
 if ($psMajorVersionLocal -lt $psMajorVersionRequired) {
     Write-Host "Flutter requires PowerShell $psMajorVersionRequired.0 or newer."
-    Write-Host "See https://flutter.dev/docs/get-started/install/windows for more."
     Write-Host "Current version is $psMajorVersionLocal."
     # Use exit code 2 to signal that shared.bat should exit immediately instead of retrying.
     exit 2

dev/bots/analyze.dart

@@ -776,7 +776,7 @@ class _DeprecationMessagesVisitor extends RecursiveAstVisitor<void> {
         _addErrorWithLineInfo(
           versionLiteral,
           error:
-              'Deprecation notice does not accurately indicate a beta branch version number; please see https://flutter.dev/docs/development/tools/sdk/releases to find the latest beta build version number.',
+              'Deprecation notice does not accurately indicate a beta branch version number; please see https://docs.flutter.dev/install/archive to find the latest beta build version number.',
         );
         return;
       }

dev/bots/test/analyze-test-input/root/packages/foo/deprecation.dart

@@ -49,13 +49,13 @@ void test8() { }
 
 @Deprecated(
   'Version number test (should fail). '
-  'This feature was deprecated after v1.20.0.' // ERROR: Deprecation notice does not accurately indicate a beta branch version number; please see https://flutter.dev/docs/development/tools/sdk/releases to find the latest beta build version number.
+  'This feature was deprecated after v1.20.0.' // ERROR: Deprecation notice does not accurately indicate a beta branch version number; please see https://docs.flutter.dev/install/archive to find the latest beta build version number.
 )
 void test9() { }
 
 @Deprecated(
   'Version number test (should fail). '
-  'This feature was deprecated after v1.21.0.' // ERROR: Deprecation notice does not accurately indicate a beta branch version number; please see https://flutter.dev/docs/development/tools/sdk/releases to find the latest beta build version number.
+  'This feature was deprecated after v1.21.0.' // ERROR: Deprecation notice does not accurately indicate a beta branch version number; please see https://docs.flutter.dev/install/archive to find the latest beta build version number.
 )
 void test10() { }