added documentation for the modules

docs.nix

@@ -0,0 +1,27 @@
+{
+  buildDocs =
+    {
+      pkgs,
+      inputs,
+      modules,
+    }:
+    let
+      eval = pkgs.lib.evalModules {
+        specialArgs = {
+          inherit inputs pkgs;
+        };
+        modules = [
+          (
+            { ... }:
+            {
+              imports = modules;
+              _module.check = false;
+            }
+          )
+        ];
+      };
+    in
+    pkgs.nixosOptionsDoc {
+      inherit (eval) options;
+    };
+}