track bundle size with github token bot

.github/workflows/bundle-size.yml

@@ -0,0 +1,39 @@
+name: Bundle Size
+
+on:
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  bundle-size:
+    name: Report bundle size
+    runs-on: ubuntu-latest
+    timeout-minutes: 30
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Setup Bun
+        uses: oven-sh/setup-bun@v1
+        with:
+          bun-version: latest
+
+      - name: Install dependencies
+        run: bun install
+
+      - name: Build
+        run: bun run build
+
+      - name: Get bundle size
+        id: size
+        run: |
+          echo "dist=$(du -sh dist | cut -f1)" >> $GITHUB_OUTPUT
+
+      - name: Update comment
+        uses: marocchino/sticky-pull-request-comment@v2
+        with:
+          GITHUB_TOKEN: ${{ secrets.TSCIRCUIT_BOT_GITHUB_TOKEN }}
+          header: Bundle Size
+          message: |
+            Bundle `dist` size: ${{ steps.size.outputs.dist }}