* First pass at adding comment trees.
- Extracted comment replies into its own table.
- Added ltree column to comment
- Added parent_id param to GetComments to fetch a tree branch
- No paging / limiting yet
* Adding child_count to comment_aggregates.
* Adding parent comment update counts
* Fix unit tests.
* Comment tree paging mostly done.
* Fix clippy
* Fix drone tests wrong postgres version.
* Fix unit tests.
* Add back in delete in unit test.
* Add postgres upgrade script.
* Fixing some PR comments.
* Move update ltree into Comment::create
* Updating based on comments.
* Fix send soft fail.
* Adding check for requests with no id or name, adding max limit.
* Consolidating a few functions.
* Fix page min
* Adding more websocket rate limits.
* Add check to GetCommunity
* Use a default message rate limit check.
* Adding a page and limit checker
* Fix clippy
* Fix clippy again
* Adding check for requests with no id or name, adding max limit.
* Consolidating a few functions.
* Fix page min
* Adding more websocket rate limits.
* Add check to GetCommunity
* Use a default message rate limit check.
* Adding a page and limit checker
* Fix clippy
* Fix clippy again
* Fix limit request.
* Move checks to inside limit_and_offset
* Fixing API tests.
* Change NotFound diesel errors to QueryBuilderError
* 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
