Split flake.nix into separate flake-parts modules

flake-modules/dev-shell.nix

@@ -0,0 +1,25 @@
+{ inputs, ... }:
+
+{
+  imports = [ inputs.devshell.flakeModule ];
+
+  perSystem.devshells.default =
+    { pkgs, ... }:
+    {
+      packages = 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; })
+      ];
+    };
+}