[ci] github action

.github/workflows/continuous-integration.yml

@@ -0,0 +1,22 @@
+name: Continuous Integration
+
+on: 
+    - pull_request
+    - push
+
+jobs:
+    docs:
+        runs-on: ubuntu-latest
+
+        steps:
+        - uses: actions/checkout@v3
+
+        - name: Setup TeX Live
+          uses: teatimeguest/setup-texlive-action@v3
+          with:
+            package-file:  |
+              ci/texlive/texlive_packages
+        - name: Sphinx Action
+          uses: ammaraskar/sphinx-action@master
+          with:
+            docs-folder: "."

requirements.txt

@@ -1,3 +1,3 @@
-sphinx>=1.9.0
+sphinx>=5.0
 sphinx_rtd_theme
 sphinxcontrib-bibtex