ci: 👷 add GitHub Pages deployment workflow

.github/workflows/deploy.yml

@@ -0,0 +1,43 @@
+name: Deploy to GitHub Pages
+
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - main
+    paths-ignore:
+      - 'docs/**'
+      - 'README.md'
+      - '.editorconfig'
+      - 'eslint.config.js'
+      - '.prettierrc.mjs'
+      - '.prettierignore'
+      - '.gitignore'
+
+# Allow this job to clone the repo and create a page deployment
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout your repository using git
+        uses: actions/checkout@v4
+      - name: Install, build, and upload your site
+        uses: withastro/action@v2
+        with:
+          package-manager: pnpm@latest
+
+  deploy:
+    needs: build
+    runs-on: ubuntu-latest
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    steps:
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v4