feat(openclaw): add openclaw-superpowers extension

- Add openclaw-superpowers as a flake input.
- Implement superpowers option in openclaw-podman module.
- Automate skill symlinking, state directory creation, and cron registration.
- Ensure PyYAML is installed within the container via a post-startup service.
- Enable superpowers in the main configuration.

flake.nix

@@ -4,11 +4,16 @@
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
     sops-nix.url = "github:Mic92/sops-nix";
+    openclaw-superpowers = {
+      url = "github:ArchieIndian/openclaw-superpowers";
+      flake = false;
+    };
   };
 
   outputs = { self, nixpkgs, sops-nix, ... }@inputs: {
     nixosConfigurations.nixos = nixpkgs.lib.nixosSystem {
       system = "x86_64-linux";
+      specialArgs = { inherit inputs; };
       modules = [
         ./configuration.nix
         ./modules