Implement email verification feature, add registration form, and update user entity for verification status

.github/workflows/ci.yml

@@ -34,6 +34,8 @@ jobs:
             *.cache-to=type=gha,scope=${{github.ref}},mode=max
       - name: Start services
         run: docker compose up --wait --no-build
+      - name: Coding Style
+        run: docker compose exec -T php vendor/bin/php-cs-fixer check --diff --show-progress=none
       - name: Check HTTP reachability
         run: curl -v --fail-with-body http://localhost
       - name: Check HTTPS reachability