feat: Port React Compiler tracker from todoist-web (#6)

* feat: Port React Compiler tracker from todoist-web

* Update imports to reference compiled extension (.mjs); add shebang to entrypoint

* Apply Biome fixes

* Refactor lodash.intersection to leverage Set

* Add dependencies

* Add tests for source and record file utilities

* Add integration tests

* Update gitignore to include Claude local settings

* Add test run to CI

* Add sample records file to gitignore

Author: frankieyan

.github/workflows/check-pull-request-health.yml

@@ -20,4 +20,5 @@ jobs:
               run: npm ci
 
             - run: npm run check
+            - run: npm run test
             - run: npm run build

.gitignore

@@ -3,6 +3,7 @@ node_modules/
 
 # Build output
 dist/
+src/__fixtures__/sample-project/.react-compiler.rec.json
 
 # Test coverage
 coverage/
@@ -31,3 +32,4 @@ npm-debug.log*
 
 # Claude
 .claude/plans/
+.claude/settings.local.json