This takes part of the work being done in #96 that was reverted but still useful.
Note Tailwind and Fresh weren't upgraded because there's no security vulnerability in either, and I have found the new versions to be worse in performance. Thos will likely stay at those fixed versions going forward.
* Public File Sharing
This implements public file sharing (read-only) with and without passwords (#57).
It also fixes a problem with filenames including special characters like `#` not working properly (#71).
You can share a directory or a single file, by using the new share icon on the right of the directories/files, and click on it to manage an existing file share (setting a new password, or deleting the file share).
There is some other minor cleanup and other copy updates in the README.
Closes#57Fixes#71
* Hide UI elements when sharing isn't allowed
