overlays: play SND0.AT3 audio file while game is loading

[Megamouse]

• Plays the game's SND0.AT3 audio file while the game is loading if available
• Additionally added support for audio in video_view elements (currently only used for savegame videos, so no audio there anyway)

fixes #18314

[AniLeo]

Working fine

[Jack54guythecoder]

Sorry for being a bit nitpicky, but the current implementation, while good, could be better.

I do not know if Mega will work more on this, but just putting this out there as a......suggestion i guess.
You see, some .AT3 files have loop points, heres an example with MotorStorm PACIFIC RIFT:

Here we can see them, this might be a bit difficult to implement, and even then, some of these just loop a bar, like how PixelJunk Racers 2nd Lap does it. nonetheless, i would like to see this implemented, AT SOME POINT...... no rush 💯

[Jack54guythecoder]

PVZ example