feat(ci): add trial bundling workflow and setup action

.github/workflows/ci-bundling-trial.yml

@@ -0,0 +1,49 @@
+name: 'Bundling Trial CI'
+
+on:
+  push:
+    branches:
+      - 'feat/ci-bundling-revamp'
+
+jobs:
+  build_bundle:
+    name: 'Build Bundle'
+    runs-on: 'gemini-cli-ubuntu-16-core'
+    steps:
+      - name: 'Checkout'
+        uses: 'actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8'
+
+      - name: 'Set up Node'
+        uses: 'actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020'
+        with:
+          node-version-file: '.nvmrc'
+          cache: 'npm'
+
+      - name: 'Install & Build'
+        run: |
+          npm ci
+          npm run bundle
+
+      - name: 'Upload Bundle'
+        uses: 'actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02' # v4
+        with:
+          name: 'gemini-bundle'
+          path: 'bundle/'
+
+  test_with_bundle:
+    name: 'Test (Linux) - Bundled Trial'
+    needs: 'build_bundle'
+    runs-on: 'gemini-cli-ubuntu-16-core'
+    steps:
+      - name: 'Checkout'
+        uses: 'actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8'
+
+      - name: 'Setup with Bundle'
+        uses: './.github/actions/setup-gemini'
+        with:
+          mode: 'bundle'
+          bundle-artifact: 'gemini-bundle'
+
+      - name: 'Run CLI Tests'
+        run: 'npm run test:ci --workspace "@google/gemini-cli"'
+        shell: 'bash'