* [chore] Remove years from all license headers
Years or year ranges aren't required in license headers. Many projects
have removed them in recent years and it avoids a bit of yearly toil.
In many cases our copyright claim was also a bit dodgy since we added
the 2021-2023 header to files created after 2021 but you can't claim
copyright into the past that way.
* [chore] Add license header check
This ensures a license header is always added to any new file. This
avoids maintainers/reviewers needing to remember to check for and ask
for it in case a contribution doesn't include it.
* [chore] Add missing license headers
* [chore] Further updates to license header
* Use the more common // indentend comment format
* Remove the hack we had for the linter now that we use the // format
* Add SPDX license identifier
* start adding admin emoji PATCH stuff
* updating works OK, now how about copying
* allow emojis to be copied
* update swagger docs
* update admin processer to use non-interface storage driver
* remove shortcode updating for local emojis
* go fmt
Co-authored-by: f0x52 <f0x@cthu.lu>
* [feature] Add emoji categories GET
Serialize emojis in appropriate categories; make it possible to get categories via the admin API
* [feature] Create (or use existing) category for new emoji uploads
* fix lint issue
* update misleading line in swagger docs
* start experimenting with swagger documentation
* further adventures in swagger
* do a few more api paths
* account paths documented
* go fmt
* fix up some models
* bit o lintin'
