AI Caption Generator

This merge request consist of the solution to the AI media powered caption. Creation of two custom module is done, one is ai_media_proof which uses Hook Event Dispatcher it aligns with Drupal's legacy hooks with Symfony's event handling by adapting a wider range of Drupal hooks. While the other custom module named EventSubscriberMethod is Drupal's Core's built-in event system. Drupal core natively dispatches certain entity-related Symfony events like EntityEvents::INSERT etc and these are different from the traditional Drupal hooks.

Note:: The EventSubscriberMethod module is not working as of now, it has some connectivity issue while the ai_media_proof module is in a working state. The feature which lets the user select their desired AI for the caption generation is yet to be introduced in the module.