feat: update origin to Angular v20.3.3

Contributing guide updated

- Add prerequisites section with required software versions
- Improve translation guidelines with clear examples
- Add Git best practices using English conventions
- Include troubleshooting section for common issues
- Add detailed pnpm installation instructions
- Update code examples section with do's and don'ts
- Add commit message and branch naming conventions

Author: ricardochl

.github/workflows/ci.yml

@@ -23,5 +23,9 @@ jobs:
           repository-cache: true
       - name: Install Dependencies
         run: npm ci
+      - name: Setup pnpm
+        uses: pnpm/action-setup@v4
+        with:
+          version: 10.17.1
       - name: Build Docs
         run: npm run build