move options to separate modules, set up mkDocs generation

modules/capabilities/gaming.nix

@@ -1,5 +1,11 @@
 { inputs, self, ... }: {
-  flake.nixosModules.gaming = { pkgs, config, lib, ... }: {
+  flake.nixosModules.gaming = { ... }: {
+    imports = [ self.nixosModules.gamingOptions ];
+
     hardware.steam-hardware.enable = true;
   };
+
+  flake.homeModules.gaming = { ... }: {
+    imports = [ self.homeModules.gamingOptions ];
+  };
 }