feat: introduce treefmt and fmt all

nix/os/snippets/radicale.nix

@@ -1,13 +1,14 @@
 {
   config,
-  lib,
   pkgs,
   repoFlakeInputs',
   ...
-}: let
+}:
+let
   # TODO: make configurable
   homeUser = "steveej";
-in {
+in
+{
   sops.secrets.radicale_htpasswd = {
     sopsFile = ../../../secrets/desktop/radicale_htpasswd;
     format = "binary";
@@ -19,11 +20,13 @@ in {
       # TODO: bump these to latest and make it work
       (
         args:
-          import ../../home-manager/programs/radicale.nix (args
-            // {
-              osConfig = config;
-              pkgs = repoFlakeInputs'.radicalePkgs.legacyPackages;
-            })
+        import ../../home-manager/programs/radicale.nix (
+          args
+          // {
+            osConfig = config;
+            pkgs = repoFlakeInputs'.radicalePkgs.legacyPackages;
+          }
+        )
       )
     ];
   };