move options to separate modules, set up mkDocs generation

modules/options/options.nix

@@ -0,0 +1,18 @@
+{ inputs, self, ... }: {
+  flake.nixosModules.options = { ... }: {
+    imports = with self.nixosModules; [
+      globalOptions
+      graphicsOptions
+      gamingOptions
+    ];
+  };
+
+  flake.homeModules.options = { ... }: {
+    imports = with self.homeModules; [
+      globalOptions
+      audioOptions
+      graphicsOptions
+      gamingOptions
+    ];
+  };
+}