Add CorsRegexEnvProcessor and corresponding tests

- Implemented CorsRegexEnvProcessor to build CORS origin regex from a comma-separated host list (ALLOWED_FRONTEND_HOSTS).
- Added tests for CorsRegexEnvProcessor to validate regex generation and matching behavior.
- Created JSON files for AST representation of the new classes and tests.

graphify-out/cache/ast/v0.8.44/a8e8a22c1e371890913e78f210ab6cbf36b0f47220e4fabad8c874c284af29ee.json

@@ -0,0 +1 @@
+{"nodes": [{"id": "users_hamed_pj_my_pj_clinic_pro_clinicpro_docker_gen_cors_env_php", "label": "gen-cors-env.php", "file_type": "code", "source_file": "docker/gen-cors-env.php", "source_location": "L1"}], "edges": [], "raw_calls": []}