Refactor executor hook for improved configuration handling and logging

- Introduced functions to load configuration from both file and API, enhancing error handling and user feedback.
- Added new command-line arguments for better flexibility in specifying paths and configurations.
- Streamlined the process of loading manifest and catalog files, with improved logging for insights generation.
- Enhanced the handling of changed files for selective model testing, ensuring clarity in output and error messages.

Author: gaurpulkit