feat(player): add audio channels settings

[abdallahmehiz]

As the title suggests, this PR adds a setting that allows users to change what audio channels the player should use. currently there are only for options: Auto, Mono, Stereo and Reverse Stereo. can be changed through Settings -> Player -> Audio channels like so	In the settings	in the player settings sheet

[hollowshiroyuki]

this really is the feature i couldn't live without, i was only using my Nintendo® Wii™ to watch anime until now, txh abdallah