- Added shared parsed and compiled caches to the parser for improved performance across engines.
- Introduced `getSharedParser` function to initialize a shared parser instance.
- Updated `NucleiEngine` initialization to optionally use shared caches based on environment variable.
- Added tests to validate shared parser behavior and benchmark performance with and without shared caches.
- Implemented sanitization of options in the compiled cache to prevent engine-scoped state retention.
