Split flake.nix into separate flake-parts modules

flake.nix

@@ -1,31 +1,20 @@
 {
-  inputs.nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
+  inputs = {
+    devshell.inputs.nixpkgs.follows = "nixpkgs";
+    devshell.url = "github:numtide/devshell";
+
+    flake-parts.url = "github:hercules-ci/flake-parts";
+
+    import-tree.url = "github:vic/import-tree";
+
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+  };
 
   outputs =
-    { nixpkgs, ... }:
-    let
-      system = "x86_64-linux";
-      pkgs = import nixpkgs { inherit system; };
-    in
-    {
-      devShells.${system}.default = pkgs.mkShell {
-        buildInputs = with pkgs; [
-          nodePackages.browser-sync
-
-          (php83.buildEnv {
-            extraConfig = ''
-              error_reporting = E_ALL & ~E_DEPRECATED & ~E_USER_DEPRECATED
-            '';
-          })
-
-          php83Packages.composer
-          tailwindcss
-
-          (import ./drafts.nix { inherit pkgs; })
-          (import ./new-draft.nix { inherit pkgs; })
-        ];
-      };
-
-      formatter.${system} = pkgs.nixfmt-rfc-style;
+    inputs:
+    inputs.flake-parts.lib.mkFlake { inherit inputs; } {
+      imports = [
+        (inputs.import-tree ./flake-modules)
+      ];
     };
 }