feat: add static site dashboard with GitHub Pages deployment

- Add Copilot API Usage Dashboard as static HTML page
- Include interactive UI with loading spinner and data visualization
- Add GitHub Actions workflow for automatic Pages deployment
- Configure OpenCode MCP with Playwright for testing

Author: ericc-ch

.github/workflows/deploy-pages.yml

@@ -0,0 +1,40 @@
+name: Deploy to GitHub Pages
+
+on:
+  push:
+    branches: [ "main" ]
+  workflow_dispatch:
+
+# Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+# Allow only one concurrent deployment, skipping runs queued between the run in-progress and latest queued.
+# However, do NOT cancel in-progress runs as we want to allow these production deployments to complete.
+concurrency:
+  group: "pages"
+  cancel-in-progress: false
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        
+      - name: Setup Pages
+        uses: actions/configure-pages@v4
+        
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v3
+        with:
+          path: ./pages
+          
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v4

opencode.json

@@ -0,0 +1,20 @@
+{
+  "mcp": {
+    "playwright": {
+      "type": "local",
+      "command": [
+        "docker",
+        "container",
+        "run",
+        "-i",
+        "--rm",
+        "--init",
+        "--network",
+        "host",
+        "mcr.microsoft.com/playwright/mcp"
+      ],
+      "enabled": true
+    }
+  },
+  "$schema": "https://opencode.ai/config.json"
+}