feat(Player): Add support for Proof of Origin tokens

[unixfox]

This PR adds the ability to configure po_token.

Fixes #674
Fixes #696

[unixfox]

Maybe I should provide some instructions on how to generate that famous potoken? Like linking to https://github.com/iv-org/youtube-trusted-session-generator

But I have no idea where you would want that? The "option" section already contains a lot of things: https://github.com/LuanRT/YouTube.js?tab=readme-ov-file#options

[LuanRT]

Usually, we add docs for things like this here. Just a link to invidious' po token generator in the readme would be more than enough.

[unixfox]

@LuanRT I have added a link to invidious youtube-trusted-session-generator in the same "options" section in the README

Code is ready for review.

[MaksymPylypenko]

Tried copying them from the browser:

po_token:"MnTFOHrx2ZbFMcUAqVR2f_PRzEIP5qfkbb-Kk6c5jcMbYqeGVSsbpkoEkfUlKN_NGbWnkUEFi-f3EFtq9mozm_mE_ZQLq2ljjVH3OjP2FZDBVEmheqvHTrDnN2ZmK6O9sdCeGi8BAixnidGaZTn0H_Do4K7N-g==",
visitor_data:"Cgs0T1RXZU11WVRDNCjmncq1BjIKCgJDQRIEGgAgJg%3D%3D"

Playback requests are still failing with 403

[LuanRT]

@MaksymPylypenko
You'll have to add it to the videoplayback requests as well (pot query param), it won't work properly otherwise.

[LuanRT]

Looks good and works like a charm. Merging.
@unixfox Thank you!