Add CI workflow and README badges

- Add npm, CI, license, node badges to README
- Add CI workflow testing Node 18, 20, 22
- Runs build, lint, typecheck on push/PR

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.github/workflows/ci.yml

@@ -0,0 +1,40 @@
+name: CI
+
+on:
+  push:
+    branches: [master, main]
+  pull_request:
+    branches: [master, main]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node-version: [18, 20, 22]
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Use Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ matrix.node-version }}
+          cache: 'npm'
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Install Playwright
+        run: npx playwright install webkit
+
+      - name: Build
+        run: npm run build
+
+      - name: Lint & Format
+        run: npm run check
+
+      - name: Typecheck
+        run: npm run typecheck
+
+      - name: Test
+        run: npm test --if-present

README.md

@@ -1,5 +1,10 @@
 # @aladac/claude-browse
 
+[![npm version](https://img.shields.io/npm/v/@aladac/claude-browse.svg)](https://www.npmjs.com/package/@aladac/claude-browse)
+[![CI](https://github.com/aladac/claude-browse/actions/workflows/ci.yml/badge.svg)](https://github.com/aladac/claude-browse/actions/workflows/ci.yml)
+[![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
+[![Node.js](https://img.shields.io/node/v/@aladac/claude-browse.svg)](https://nodejs.org)
+
 Headless browser automation for Claude Code using Playwright WebKit.
 
 ## Installation