Stylelint is a css linter: https://stylelint.io/
As part of this change we have added two javascript scripts:
```
pnpm lint:css
pnpm lint:css:fix
```
Look at `.vscode/settings.json.sample` and `.vscode/extensions.json` for
configuration in VSCode.
---------
Co-authored-by: Joffrey JAFFEUX <j.jaffeux@gmail.com>
There's no UI for it at the moment but when creating a channel or updating it, it's now possible to pass `icon_upload_id` as param. This will be available on the channel as `icon_upload_url`.
