YouTube Livestreams Theater Mode per NaPaliGhost

Adds an enhanced theater mode to YouTube livestreams with the following features:
- display chat next to the video
- move chat to the left side
- show chat on top of the video
- hide or popout chat
- display livestream information (title, view count, description, ...) without leaving theater mode

Available settings:
- force dark theme in theater mode
- show YouTube header while in livestreams theater mode
- chat width (next to video)
- chat width (over video)
- chat over video margin top & bottom
- display livestream information on hover over the video / info-icon
- overlay and chat over video background opacity
- show overlay text shadows
- default chat side and mode
- automatically enter livestreams theater mode (live & replay)
- shortcut to toggle livestreams theater mode

Chat customization options:
- default chat (top chat / live chat)
- colored usernames
- hide profile pictures
- hide live reactions
- super chat currency converter: adds the converted currency under / next to the original currency, shows the name of the original currency on hover

Other features:
- display obvious hint when the video is behind on a livestream

Permissions:
- storage permission is needed to save settings
- optional host permission for 'napalighost.com' is needed when super chat currency converter is turned on

Other browsers:
- available as a Google Chrome extension: https://chrome.google.com/webstore/detail/youtube-livestreams-theat/cmjhejfkhdonjimgkinjdombabgfbcal