Use upstream pykms and Actual Budget. Move Actual to s0. Add automated backups for Actual.

overlays/default.nix

@@ -4,10 +4,4 @@ final: prev:
 let
   system = prev.system;
 in
-{
-  actual-server = prev.callPackage ./actualbudget { };
-
-  # Copied entire package from nixpkgs to downgrade to python 3.11 since 3.12 is broken.
-  # See: https://github.com/Py-KMS-Organization/py-kms/issues/117
-  pykms = prev.callPackage ./pykms.nix { };
-}
+{ }