feat: Test Action

Including commits:
* chore: Disable test workflow
* Determine hosts
* Build each host
* Add NixOS to build step as well
* More specific hostnames
* fix json elements
* try different way
* Debug matrix
* run on push
* use var directly
* fix mappings
* fix mappings
* add toolcache
* Change names and ordere
* Debugging
* Debugging extra step
* Debugging needs outputs
* Debugging needs outputs hosts
* Preserve quotes
* printf escaped
* Using EOF
* test
* escape?
* without json parse
* hardcoding
* change build command
* Testing

.github/workflows/test.yml

@@ -0,0 +1,17 @@
+name: "Test"
+on:
+  pull_request:
+  push:
+jobs:
+  tests:
+    if: false
+    runs-on: ubuntu-latest
+    container:
+      image: catthehacker/ubuntu:act-latest
+    steps:
+    - uses: actions/checkout@v5
+    - uses: https://github.com/cachix/install-nix-action@v31
+      with:
+        nix_path: nixpkgs=channel:nixos-unstable
+    - name: "My custom step"
+      run: nix run nixpkgs#hello