Rewrite streams logic

[SamantazFox]

WIP

This PR is meant to overhaul how the streams' data (formats/adaptativeFormats) is parsed.

Objectives:

• support videos with multiple audio tracks ([Enhancement] Add support for multiples audio tracks #2007)
• provide a much more stable interface/API ([Bug] Difficult to understand qualitiy selection in listen mode #2513, [Bug] adaptiveFormats missing fields in some formats #2647, [Enhancement] adding 30fps/60fps frame rate selection for 720p dash #2988)
• Fix various audio issues (Audio only mode (listen=1) not working for livestreams #597, [Bug] Spatial audio positioned incorrectly #2393, [Enhancement] normalize audio volume #3600)
• Add mime types back to the DASH manifest on demand ([Feature request] Build audio/webm and video/webm streams in DASH manifest #3342)

[ChunkyProgrammer]

Here are some useful test videos for multi-audio tracks:

• https://youtu.be/YLt73w6criQ (english original + a lot of dubs)
• https://youtu.be/Kn56bMZ9OE8 (english original, english dubbed + english descriptive)

[PikachuEXE]

Also here is a video with missing attributes on some formats (AV1): https://youtu.be/8IFwpI7OT6I
From FreeTubeApp/FreeTube#3382

[absidue]

Haven't checked anything else as this still seems to be work in progress, but I just thought I would mention that as I saw it while flying over the code.

[absidue]

Could you please include the bitrate for the formatStreams in the API, I know it's not used by Invidious, but it's returned by YouTube and I would like to display it in FreeTube's debug/stats overlay.

[hikkamorii]

While this is an improvement, it's still ambiguous whether AAC or Opus is used. Also, the "k" will be appended later, and it will not be inline with how it works when selecting audio quality for video. (feel free to ask me for patch that will add codec for the selection)