* refactor: move app/theme to pkg/theme
* refactor
* wip
* use dockerindocker
* add providertest
* wip
* wip
* test(docker): get state now uses dind container to test against a real provider
* test(docker): move to docker_test package
* refactor(docker): create container_inspect.go
* test(docker): add more dind test
* test(docker): event test now use docker in docker
* refactor: remove unused instance type props
* refactor test docker
* fix instance list sort
* stabilize test
* remove testcontainers custom config
This features adds rfc7807 Problem detail responses when an error happens processing a request.
This will greatly improve the common issues with "blank pages" and "404 pages" issues which should now properly tell the user what input was wrong (group that does not exist, container name that does not exist, etc.)
