New page in docs: "Rejected Addon Ideas"
Complication of things said in https://github.com/ScratchAddons/ScratchAddons/issues/5830 but as a page in the documentation.
TODO: mention "invite all followers to studio", "delete everything on backpack", "unfollow everyone", and similar
I think we should also mention popular requests for things that aren't technically rejected, but are pretty unlikely to happen like account switching or adding hidden blocks to the block palette.
dont forget about features that would break vanilla scratch or make large difference in usability of projects such as a new block that adds gravity for example.