feat: add GitHub Actions workflow for documentation deployment

.github/workflows/docs.yml

@@ -0,0 +1,48 @@
+name: Deploy Documentation Site
+on:
+  push:
+    branches: ["main"]
+
+  workflow_dispatch:
+
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+permissions: {}
+jobs:
+  build:
+    permissions:
+      contents: write
+    name: Build & Deploy
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Setup Pages
+        uses: actions/configure-pages@v5
+
+      - uses: oven-sh/setup-bun@v2
+        with:
+          bun-version: latest
+
+      - run: bun i
+
+      - run: bun run docs
+
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v3
+        with:
+          path: docs
+
+  deploy:
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    runs-on: ubuntu-latest
+    needs: build
+    steps:
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v4