This improves the output produced when running an unknown command,
running the "help" command, and when trying to run a command you are not
allowed to run. The new help output includes links to the project of the
chatops integration, and a link to the chatops documentation.
Instead of only exposing a User to slash commands we now also expose the
ChatName object that the User object is retrieved from. This is
necessary for GitLab Chatops as we need for example the user ID of the
chat user.
This is allowed for existing instances so we don't end up 76 offenses
right away, but for new code one should _only_ use this if they _have_
to remove non database data. Even then it's usually better to do this in
a service class as this gives you more control over how to remove the
data (e.g. in bulk).
Fix https://gitlab.com/gitlab-org/gitlab-ce/issues/27070
Deprecate "chat commands" in favor of "slash commands"
We looked for things like:
- `slash commmand`
- `slash_command`
- `slash-command`
- `SlashCommand`
GitLab Bot