documentation added.

Author: MairwunNx

documentation/in-using.md

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+> ## Documentation for basically using `Chat` module.
+
+## 1. For playing and running minecraft:
+
+#### 1.1 Download `Chat` mod module.
+
+Visit **Chat** repository on github, visit **releases** tab and download `.jar` files of latest _pre-release_ / release (**recommended**)
+
+Releases page: <https://github.com/ProjectEssentials/ProjectEssentials-Chat/releases>
+
+#### 1.2 Install `Chat` modification.
+
+The minecraft forge folder structure below will help you understand what is written below.
+
+> ##### Important note: don't forget install mod dependencies!
+
+- core: <https://github.com/ProjectEssentials/ProjectEssentials-Core/releases>
+- permissions: <https://github.com/ProjectEssentials/ProjectEssentials-Permissions/releases>
+
+
+```
+.
+├── assets
+├── config
+├── libraries
+├── mods (that's how it should be)
+│   ├── Project Essentials Chat-1.14.4-0.X.X.X.jar
+│   ├── Project Essentials Core-MOD-1.14.4-1.X.X.X.jar.
+│   └── Project Essentials Permissions-1.14.4-1.X.X.X.jar.
+└── ...
+```
+
+Place your mods and Chat mod according to the structure above.
+
+#### 1.3 Verifying mod on the correct installation.
+
+Run the game, check the number of mods, if the list of mods contains `Project Essentials Chat` mod, then the mod has successfully passed the initialization of the modification.
+
+After that, go into a single world, then try to write the any message in chat, if you see message `[LOCAL] [Nickname]: your message`, then the modification works as it should.
+
+#### 1.4 Control your chat via minecraft commands.
+
+**Not implemented yet.**
+
+#### 1.5 Control your chat via configuration.
+
+**I will write a little later.**
+
+### For all questions, be sure to write issues!