feat: add python3 to omp

package.nix

@@ -18,6 +18,7 @@
   oh-my-pi,
   opencode,
   pkgs,
+  python3,
   shellcheck,
   sscli,
   tofu-ls,
@@ -730,6 +731,9 @@ nixvim.makeNixvim {
       app = {
         package = oh-my-pi;
         runScript = "omp";
+        addPkgs = [
+          python3
+        ];
       };
       imports = [ bwrapperPresets.devshell ];
       mounts.readWrite = [