Add: Start to deploy the python-gvm docs at github pages too

This will allow to get rid of readthedocs in future.

.github/workflows/github-pages.yml

@@ -0,0 +1,44 @@
+name: Deploy docs to GitHub Pages
+
+on:
+  # Runs on pushes targeting the default branch
+  push:
+    branches: [main]
+
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+# Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+# Allow one concurrent deployment
+concurrency:
+  group: "pages"
+  cancel-in-progress: true
+
+jobs:
+  deploy:
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Install poetry and dependencies
+        uses: greenbone/actions/poetry@v1
+        with:
+          version: "3.9"
+      - name: Build Documentation
+        run: |
+          cd docs && poetry run make html
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v1
+        with:
+          path: 'docs/build/html'
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v1