feat: add build ci

.github/workflows/build.yml

@@ -0,0 +1,39 @@
+name: Build Browser Extension
+
+on:
+  pull_request: {}
+  push:
+    branches:
+      - main
+    tags:
+      - v*
+jobs:
+  publish:
+    name: Build Extension
+    permissions:
+      contents: write
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v4
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: "20"
+          cache: "npm"
+          registry-url: "https://registry.npmjs.org"
+
+      - name: Install dependencies
+        run: npm ci --ignore-scripts
+
+      - name: Build Chrome extension
+        run: npm run build
+
+      - name: Build Firefox extension
+        run: npm run build:firefox
+
+      - name: Upload build asset
+        uses: actions/upload-artifact@v3
+        with:
+          name: extension-builds-${{ github.event.number || github.event.head_commit.id }}
+          path: dist/*.zip