refactor: statix, deadnix, alejandra

shells/default.nix

@@ -0,0 +1,20 @@
+{
+  lib,
+  tree,
+  inputs,
+  ...
+}: let
+  inherit (lib.attrsets) mapAttrs;
+in
+  inputs.utils.lib.eachDefaultSystem (system: {
+    devShells = let
+      shells = mapAttrs (_: path:
+        import path rec {
+          inherit tree inputs system;
+          pkgs = inputs.nixpkgs.legacyPackages.${system};
+          inherit (inputs.nixpkgs) lib;
+        })
+      tree.shells;
+    in
+      shells // {default = shells.repo;};
+  })