ci: woodpecker -> forgejo actions

.forgejo/workflows/test.yml

@@ -0,0 +1,19 @@
+on: [push]
+
+jobs:
+  test:
+    runs-on: docker
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Zig
+        uses: https://github.com/goto-bus-stop/setup-zig@v2
+        with:
+          version: 0.12.0
+
+      - name: Test
+        run: |
+          zig fmt --check .
+          zig build
+          zig build test

.woodpecker.yml

@@ -1,7 +0,0 @@
-steps:
-  build:
-    image: git.mzte.de/lordmzte/zig-build
-    pull: true
-    commands:
-      - zig fmt --check .
-      - zig build -Doptimize=ReleaseFast