add mkdocs

.gitea/workflows/test.yaml

@@ -25,4 +25,10 @@ jobs:
           pip install -r requirements.txt
       - name: Run tests
         run: |
-          pytest
+          pytest
+      - name: Build docs with mkdocs
+        run: |
+          pip install mkdocs mkdocs-material mkdocs-material-extensions
+          cd docs
+          mkdocs build
+          find site