fix: add pytest step

.gitea/workflows/ci.yml

@@ -3,4 +3,14 @@ on: [push, pull_request]
 jobs:
   test:
     runs-on: ubuntu-latest
-    steps: [ { run: "echo hello" } ]
+    steps:
+      - name: Clone repo
+        run: |
+          git clone https://${{ gitea.server }}/${{ gitea.repository }} .
+          git checkout ${{ gitea.sha }}
+
+      - name: Install and test
+        run: |
+          pip3 install pytest
+          pip3 install click pyyaml rich
+          pytest tests/ -v --tb=short