Feat: Video Playback Support via Media Sources (Experimental Test Build)

[Harshcombo50548]

This pull request introduces support for video files as reaction sources.
This is a significant change to the plugin's core and should be considered a temporary, unstable test build.

Here is a summary of my Changes:
The original plugin was limited to static images and GIFs using OBS's graphics library (gs_image_file3) this implementation has been completely replaced to use OBS's internal media source framework (ffmpeg_source).
This allows the plugin to function like a "Media Source" capable of playing video files like .mov, .mp4, and any other format supported by the user's OBS installation.

Technical Details:
Video Playback: Users can now select video files in the source properties
Complete Core Refactor ; Removed all logic related to gs_image_file3_t for loading textures the plugin now creates and manages two internal ffmpeg_source instances, one for each reaction state the rendering logic was updated from drawing sprites (gs_draw_sprite) to rendering the active media source (obs_source_video_render) the animation reset logic was updated to use obs_source_update which correctly triggers a restart of the media file from the beginning.

Testing & Stability:
Tested on Windows these changes have been compiled and tested on a Windows machine where the functionality works as expected videos load, play, and restart correctly based on the audio source.
I worked a couple of hours and did not want to create a new linux VM thus its not Tested on Linux/macOS there may be platform-specific issues that need to be addressed

Potential for Instability:
There is a possibility of undiscovered bugs (Checkboxes for resetting image after reaction does not work I think) or performance issues this build is intended for testing and feedback (Even though I Might not change things) this new functionality provides a much more flexible and powerful tool for creators but it requires further testing across all platforms before it can be considered stable. Thank you for your consideration and now I can use my gif without limiting frames =D

obs64_sxYZ6IQFhh.mp4

[scaledteam]

Very interesting, but i'm not sure, should it be an option to use ffmpeg instead of OBS graphics library, or should it be a separate plugin. Anyway, thank you for contributing, i need some time to make a decision. Maybe i'll ask about this on forum.