* Improve types
* More types, fix default permission for viewers added to collection
* fix change of default role for CollectionGroup
* Restore policy
* test
* tests
This PR moves the entire project to Typescript. Due to the ~1000 ignores this will lead to a messy codebase for a while, but the churn is worth it – all of those ignore comments are places that were never type-safe previously.
closes#1282