* Moving settings to Database.
- Moves many settings into the database. Fixes#2285
- Adds a local_site and instance table. Fixes#2365 . Fixes#2368
- Separates SQL update an insert forms, to avoid runtime errors.
- Adds TypedBuilder to all the SQL forms, instead of default.
* Fix weird clippy issue.
* Removing extra lines.
* Some fixes from suggestions.
* Fixing apub tests.
* Using instance creation helper function.
* Move forms to their own line.
* Trying to fix local_site_data, still broken.
* Fixing federation tests.
* Trying to fix check features 1.
* Addressing PR comments.
* Adding check_apub to all verify functions.
* Create example for apub lib
* some rewriting of apub lib
* Add LocalInstance struct for apub lib to avoid using Lemmy Settings
* Move ActorType trait to lemmy_apub, because its not needed in library
* Use reqwest_retry instead of custom impl, dont specify timeout on every send()
* Some improvements to example
* Moved inbox handling to library
* bug fixes
* Move context and serde helpers into library
* wip: example changes
* Add lemmy_utils feature to build only LemmyError
* Rename to activitypub_federation
* Remove lemmy_utils dep from activitypub_federation using generic error type
* Finish activitypub example
* Cleanup and fix tests
* Reorganize library files
* Remove ApubObject.to_tombstone()
* Extract activitypub library into separate git repository
