Add CI

.github/renovate.json

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+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "extends": [
+    "github>cucumber/renovate-config"
+  ]
+}

.github/workflows/codeql-javascript.yaml

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+name: codeql-javascript
+
+permissions: { }
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+
+  schedule:
+    - cron: '48 5 * * 1'
+
+concurrency:
+  # Cancels in-progress runs only for pull requests
+  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
+jobs:
+  analyze:
+    name: Analyze JavaScript
+    runs-on: 'ubuntu-latest'
+    permissions:
+      security-events: write
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+      - uses: github/codeql-action/init@7211b7c8077ea37d8641b6271f6a365a22a5fbfa # v4.36.0
+        with:
+          languages: javascript
+          build-mode: none
+      - uses: github/codeql-action/analyze@7211b7c8077ea37d8641b6271f6a365a22a5fbfa # v4.36.0
+        with:
+          category: "/language:javascript-typescript"

.github/workflows/test-javascript.yml

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+name: test-javascript
+
+permissions: {}
+
+on:
+  push:
+    branches:
+      - main
+      - renovate/**
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  test:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+          - ubuntu-latest
+        node-version:
+          - '24.x'
+    steps:
+    - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      with:
+        persist-credentials: false
+    - name: with Node.js ${{ matrix.node-version }} on ${{ matrix.os }}
+      uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
+      with:
+        node-version: ${{ matrix.node-version }}
+        cache: 'npm'
+        cache-dependency-path: package-lock.json
+    - run: npm install-ci-test

.github/workflows/zizmor-analysis.yaml

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+name: GitHub Actions Security Analysis
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - '.github/**'
+  pull_request:
+    branches:
+      - main
+    paths:
+      - '.github/**'
+
+permissions: {}
+
+jobs:
+  zizmor:
+    name: Run Zizmor
+    runs-on: ubuntu-latest
+    permissions:
+      security-events: write
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+
+      - name: Run Zizmor
+        uses: zizmorcore/zizmor-action@5f14fd08f7cf1cb1609c1e344975f152c7ee938d # v0.5.6