fix(test-utils): Move @spotlightjs/spotlight to repo root devDependencies

Installing Spotlight in individual test apps causes version conflicts
because Spotlight's transitive dependencies (e.g. @sentry/electron)
require specific @sentry/* versions that conflict with the freshly
built packages used by E2E tests.

Moving to root devDependencies avoids this conflict - the Spotlight CLI
is available globally without polluting test app dependency trees.

Author: BYK

dev-packages/e2e-tests/test-applications/react-router-7-lazy-routes/package.json

@@ -44,7 +44,6 @@
   "devDependencies": {
     "@playwright/test": "~1.56.0",
     "@sentry-internal/test-utils": "link:../../../test-utils",
-    "@spotlightjs/spotlight": "^4.7.2",
     "serve": "14.0.1",
     "npm-run-all2": "^6.2.0"
   },

dev-packages/test-utils/package.json

@@ -49,7 +49,6 @@
   "devDependencies": {
     "@playwright/test": "~1.56.0",
     "@sentry/core": "10.30.0",
-    "@spotlightjs/spotlight": "^4.7.2",
     "eslint-plugin-regexp": "^1.15.0"
   },
   "volta": {

package.json

@@ -104,6 +104,7 @@
     "dev-packages/bundler-tests"
   ],
   "devDependencies": {
+    "@spotlightjs/spotlight": "^4.7.2",
     "@rollup/plugin-commonjs": "^25.0.7",
     "@rollup/plugin-esm-shim": "^0.1.5",
     "@rollup/plugin-json": "^6.1.0",