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/.graphify_labels.json

@@ -695,5 +695,33 @@
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+  "699": "Community 699",
+  "700": "Community 700",
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+  "702": "Community 702",
+  "703": "Community 703",
+  "704": "Community 704",
+  "705": "Community 705",
+  "706": "Community 706",
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 }