Reformat repository using new nixfmt-rfc-style.
Instead of having to manually stub packages that should not be downloaded we instead automatically stub all packages (except a small list of whitelisted ones). Tests can re-introduce the real package by using the `realPkgs` module argument.
Switches the kime configuration format to use unstructured text. This is necessary since version 3 and upwards use YAML tags.
* kime: Fix kime systemd service * kime: Add test case * kime: Add test stub package
