ci: add pytest Forgejo Actions

.forgejo/workflows/tests.yml

@@ -0,0 +1,13 @@
+on: [ push ]
+jobs:
+  tests:
+    container:
+      image: docker.io/library/python:3.11-alpine
+    runs-on: docker
+    steps:
+      - run: apk add --no-cache git nodejs-current
+      - uses: actions/checkout@v4
+
+      - run: pip install -U pytest beartype termcolor
+      - run: pytest
+        working-directory: compiler