Add dark website and documentation with GitHub Pages deployment

Include the updated desktop screenshot, active-monitor screenshot capture and editor locking, and Settings window drag areas.

.github/workflows/pages.yml

@@ -0,0 +1,43 @@
+name: Deploy website to GitHub Pages
+on:
+  push:
+    branches: [main]
+    paths:
+      - "site/**"
+      - "docs/**"
+      - "packaging/icons/ferese.svg"
+      - "scripts/build-site.py"
+      - ".github/workflows/pages.yml"
+  workflow_dispatch:
+permissions:
+  contents: read
+concurrency:
+  group: pages
+  cancel-in-progress: false
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v6
+      - uses: actions/configure-pages@v5
+      - name: Build website and handbook
+        run: |
+          python3 -m venv .site-venv
+          .site-venv/bin/pip install -r site/requirements.txt
+          .site-venv/bin/python scripts/build-site.py
+      - uses: actions/upload-pages-artifact@v4
+        with:
+          path: build/site
+  deploy:
+    needs: build
+    runs-on: ubuntu-latest
+    permissions:
+      pages: write
+      id-token: write
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    steps:
+      - name: Deploy
+        id: deployment
+        uses: actions/deploy-pages@v4