[Feature Request] Port Floorp Sidebar Panels to Mozilla's Sidepanel Specification

[moriel5]

Since it seems that Floorp's sidebar implementation is going to be deprecated (for non-developers reading this, deprecation is not the same as removal) in favor of Mozilla's new sidebar implementation in Floorp 12, it may be a good idea to port any relevant Floorp sidebar panels to Mozilla's sidepanel specification, as their sidebar is reliant upon it, and as such, any 3rd party sidepanels are fully compatible with Mozilla's new sidebar.

This will also have the added benefit for those who have disabled the sidebar (like me) of still being able to benefit from Floorp's panels even without the sidebar, while not detracting from the experience of those who do use the sidebar.