CI: check for warnings, add stuff to .gitignore (#197)

* DOC: add generated *.rst files to .gitignore

* CI: check for Sphinx warnings

* Add some generated files to .gitignore

Author: mgeier

.github/workflows/test.yml

@@ -41,4 +41,4 @@ jobs:
     - name: Test examples
       run: uv run --locked --with pillow --script doc/examples/run_all.py
     - name: Test documentation
-      run: uv run --locked -m sphinx doc/ _build/ -b doctest
+      run: uv run --locked -m sphinx doc/ _build/ -b doctest -W

.gitignore

@@ -4,3 +4,7 @@ build/
 dist/
 .eggs/
 sfs.egg-info/
+/doc/sfs.*.rst
+/doc/examples/*.gif
+/doc/examples/*.png
+.ipynb_checkpoints/