ci: ensure plugin components are valid

.github/workflows/plugin-lint.yaml

@@ -0,0 +1,21 @@
+name: Plugin Linting & Testing
+
+on:
+  pull_request:
+
+  push:
+    branches:
+      - main
+
+jobs:
+  tests:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Lint
+        run: docker compose run --rm lint
+
+      - name: Test
+        run: docker compose run --rm tests