* Updates `StatusButtonComponent` to use `turbo-method: :delete` for
"Not set" menu item.
* Adds `Projects::StatusController#destroy` action, routes and
accompanying permissions.
* Introduces `Projects::StatusButtonComponent` and its Lookbook Preview.
* Defines colours, icons as (Ruby) constants nested under
`Project::Statuses` (c.f. `Meetings::Statuses`).
* Adds `Projects::StatusController` with `#update` action, routes and
accompanying permissions.