Added ability to change video tracks

[ItsMeSamey]

Some videos may have multiple video tracks, this pr adds the ui and functionality to change video tracks for the videos that have multiple of them.

Example use case:
My university lectues are presented on 2 screens, the recordings made available have 2 video streams as well.
Sometimes, due to some malfunction, one of the screens may fails to record the video, so i need to switch the video streams in order to see the video being presented.

Note: this changes the 3_4 migration (since the migration is new and has not been pushed in release yet, this should not be an issue).

[anilbeesetti]

@ItsMeSamey Thanks for the PR. Can you add screen recording of the feature and some test video to test the feature

[ItsMeSamey]

Test file: named_tracks.zip
Generated using

ffmpeg -f lavfi -i color=c=red:s=1920x1080:d=10 \
       -f lavfi -i color=c=green:s=1920x1080:d=10 \
       -f lavfi -i color=c=blue:s=1920x1080:d=10 \
       -map 0:v -map 1:v -map 2:v \
       -metadata:s:v:0 title="Red Track" \
       -metadata:s:v:1 title="Green Track" \
       -metadata:s:v:2 title="Blue Track" \
       -c:v libx264 -an named_tracks.mkv

has 3 video tracks red(30s), green(60s) and blue(120s)

Demo:

recording_20260221_183012.mp4