ci: add lint check

Author: paulmueller

.github/workflows/check.yml

@@ -2,6 +2,18 @@ name: Checks
 on: [push, pull_request]
 
 jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: '3.12'
+      - name: Install requirements
+        run: pip install flake8
+      - name: Check syntax
+        run: flake8 ckanext
+
   test:
     strategy:
       matrix: