Add VS Code extension landing page with violet theme, three feature sections, comparison table

Author: jpr5

.github/workflows/deploy-pages.yml

@@ -0,0 +1,33 @@
+name: Deploy to GitHub Pages
+
+on:
+  push:
+    branches: [main]
+    paths:
+      - 'docs/**'
+
+permissions:
+  pages: write
+  id-token: write
+
+concurrency:
+  group: pages
+  cancel-in-progress: false
+
+jobs:
+  deploy:
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/configure-pages@v5
+
+      - uses: actions/upload-pages-artifact@v3
+        with:
+          path: docs
+
+      - id: deployment
+        uses: actions/deploy-pages@v4

docs/.nojekyll

@@ -0,0 +1 @@
+vscode.copilotkit.dev