Fix #9369

* Add REST API for creating an account

The method is available to apps with a token obtained via the client
credentials grant. It creates a user and account records, as well as
an access token for the app that initiated the request. The user is
unconfirmed, and an e-mail is sent as usual.

The method returns the access token, which the app should save for
later. The REST API is not available to users with unconfirmed
accounts, so the app must be smart to wait for the user to click a
link in their e-mail inbox.

The method is rate-limited by IP to 5 requests per 30 minutes.

* Redirect users back to app from confirmation if they were created with an app

* Add tests

* Return 403 on the method if registrations are not open

* Require agreement param to be true in the API when creating an account

This allowed you to brick your system when running that command, because the accounts would continue to advertise the old public key, but sign things with the new one

- Some associations were missing from the clean-up
- Some attributes were not reset on suspension
- Skip federation and streaming deletes when purging a dead domain
- Move account association definitions to concern

Fixes #9411

Just the color is not enough change since not everyone uses colored
terminals.
Touching the account makes it so that the account is not in the
threshold window in case of running again

* Fixed an issue where "tootctl media remove" can not count the file size.

* Fixed the problem pointed out by codeclimate.

Fix #9237

* Display amount of freed disk space in tootctl media remove

Fix #9213

* Fix code style issue

* Bump version to 2.6.0

* Update CHANGELOG.md

* Bump version to 2.6.0rc4

* Update CHANGELOG.md

* Bump version to 2.6.0rc3

* Update CHANGELOG.md

Leave `tootctl accounts cull` to simply check removed accounts from
live domains, and skip temporarily unavailable domains, while listing
them in the final output for further action.

Add `tootctl domains purge DOMAIN` to be able to purge a domain from
that list manually

* Bump version to 2.6.0rc2

* Update CHANGELOG.md

Fix #8741

* Delete first 9 accounts on dead servers

* Clean up code by moving dead server culling to the end

* Bump version to 2.6.0rc1

* Update AUTHORS.md

* Update CHANGELOG.md

* cleanup pass

* undo mistakes

* fixed.

* revert

This strips metadata on file upload by re-encoding the files, at the cost
of possible slight image quality decrease and processing resources.

* Move more tasks to tootctl

- tootctl feeds build
- tootctl feeds clear
- tootctl accounts refresh

Clean up exit codes and help messages

* Move user modifying to tootctl

* Improve user modification through CLI, rename commands

add -> create
mod -> modify
del -> delete

To remove ambiguity

* Fix code style issues

* Fix not being able to unset admin/mod role

Found via `codespell -q 3 --skip="./app/javascript/mastodon/locales,./config/locales"`

* add rake task for generating AUTHORS.md

* update AUTHORS.md

* rubocop

* CLI interface for creating/deleting local users

- tootctl accounts add USERNAME
- tootctl accounts del USERNAME

* Add CLI interface for culling remote users that no longer exist

- tootctl accounts cull