add initial action

.forgejo/workflows/action.yml

@@ -0,0 +1,25 @@
+name: Test action
+
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - main
+
+jobs:
+  hello:
+    name: Print hello world
+    runs-on: default
+    steps:
+      - name: Install nodejs
+        run: nix-env -iA nixpkgs.nodejs
+
+      - uses: actions/checkout@v4
+
+      - run: whoami
+      - run: node -v
+      - run: nix --version
+
+      - run: ls -al
+
+      - run: nix --extra-experimental-features "nix-command flakes pipe-operators" flake check