* don't use old hardcoded rule for validating imported posts
* fix http verb in doc
* Use client config
* Handle local mode
* E2E tests
* Enforce default if unable to use real limit
* Unit tests
* Fix tests
* Use model.PostMessageMaxRunesV2 as lower default
* Update direct post message length validation
---------
Co-authored-by: Mattermost Build <build@mattermost.com>
Co-authored-by: streamer45 <cstcld91@gmail.com>
It was a good decision in hindsight to keep the public module as 0.x
because this would have been a breaking change again.
https://mattermost.atlassian.net/browse/MM-53032
```release-note
Changed the Go module path from github.com/mattermost/mattermost-server/server/v8 to github.com/mattermost/mattermost/server/v8.
For the public facing module, it's path is also changed from github.com/mattermost/mattermost-server/server/public to github.com/mattermost/mattermost/server/public
```
* Includes mmctl into the mono-repo
* Update to use the new public module paths
* Adds docs check to the mmctl CI
* Fix public utils import path
* Tidy up modules
* Fix linter
* Update CI tasks to use the new file structure
* Update CI references
