Add a nix/develop action

Signed-off-by: Gergely Nagy <me@gergo.csillger.hu>

.forgejo/workflows/nix-develop.yaml

@@ -0,0 +1,32 @@
+---
+name: test nix/develop
+
+on:
+  push:
+
+jobs:
+  nix/develop:
+    runs-on: nixos-flakes
+    steps:
+      - name: checkout
+        uses: actions/checkout@v3
+
+      - name: run a command within a dev environment
+        uses: ./develop
+        with:
+          flake: ./develop/test
+          package: "hello"
+          run: |
+            hello
+
+      - name: run multiple commands within a dev environment
+        uses: ./develop
+        with:
+          flake: ./develop/test
+          package: "hello"
+          run: |
+            gcc --version
+            hello
+            if [ -n "${CI}" ]; then
+                echo "I'm running in CI!"
+            fi