* [MM-20684] Initial implementation of the Command Autocomplete (#13602)
* Implement Autocomplete Data
* Change CommandName to Trigger
* Fix Autocomplete test
* Make stylistic changes
* Rename a bunch of fields and methods
* Fix variable names, safer type assertions
* [MM-20684] plugin autocomplete implementation (#14259)
* Add an endpoint for command autocomplete suggestions
* Add full Suggestion to the AutocompleteSugestion struct
* Add Dynamic Argument support
* Tidy up things
* Fix missed test case
* Add support of the named arguments
* Update autocomplete API
Fix review issues
Implement dynamic args as a local request
* Fix ineffassign
* Add support of the uppercase letters in arguments
* Add support of the optional arguments
* Remove ineffectual assignment
* Add support for icons (#14489)
* Address couple of nits
* Add comment to IconData
* Add types to all consts
Co-authored-by: mattermod <mattermod@users.noreply.github.com>
