Add GitHub Actions CI Workflow

A new continuous integration (CI) workflow has been added to the project using GitHub Actions. This setup builds and deploys the project when changes are pushed to the main branch. It uses the latest Ubuntu version, Python 3.x, and includes steps for installing required libraries and deploying the built documentation.

.github/workflows/ci.yml

@@ -0,0 +1,22 @@
+name: ci
+on:
+  push:
+    branches:
+      - main
+permissions:
+  contents: write
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v4
+        with:
+          python-version: 3.x
+      - uses: actions/cache@v2
+        with:
+          key: ${{ github.ref }}
+          path: .cache
+      - run: pip install mkdocs-material
+      - run: pip install pillow cairosvg
+      - run: mkdocs gh-deploy --force