* Able to authenticate user against IndieAuth. For #1273
* WIP server indieauth endpoint. For https://github.com/owncast/owncast/issues/1272
* Add migration to remove access tokens from user
* Add authenticated bool to user for display purposes
* Add indieauth modal and auth flair to display names. For #1273
* Validate URLs and display errors
* Renames, cleanups
* Handle relative auth endpoint paths. Add error handling for missing redirects.
* Disallow using display names in use by registered users. Closes#1810
* Verify code verifier via code challenge on callback
* Use relative path to authorization_endpoint
* Post-rebase fixes
* Use a timestamp instead of a bool for authenticated
* Propertly handle and display error in modal
* Use auth'ed timestamp to derive authenticated flag to display in chat
* Fediverse chat auth via OTP
* Increase validity time just in case
* Add fediverse auth into auth modal
* Text, validation, cleanup updates for fedi auth
* Fix typo
* Remove unused images
* Remove unused file
* Add chat display name to auth modal text
