Handle generation of code artifacts in CI

.gitlab-ci.yml

@@ -15,8 +15,17 @@ pages:
     - cd ..
     - mkdir public
     - cp -r docs/_build/html/* public
+    - cd build/python-api-src
+    - stubgen -m library -o .
+    - cd ../..
+    - python3 generate_pydocs.py
+    - mkdir artifacts
+    - cp build/python-api-src/library.cpython-*-x86_64-linux-gnu.so artifacts
+    - cp build/python-api-src/library.pyi artifacts
   artifacts:
     paths:
       - public
+      - artifacts
   only:
     - master
+    - python12_update
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