ci(tools): add GitHub Actions workflow for TypeScript tests

Run coordinate picker unit tests on push/PR to main when tools/ changes.

Configuration:
- Node.js versions: 20.x, 22.x
- Platforms: ubuntu-latest, macos-latest, windows-latest
- Steps: install deps, build TypeScript, run tests with coverage
- Path filtering: only triggers on tools/ or workflow changes

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

Author: grokify

.github/workflows/test-tools.yaml

@@ -0,0 +1,40 @@
+name: Tools Tests
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - 'tools/**'
+      - '.github/workflows/test-tools.yaml'
+  pull_request:
+    branches:
+      - main
+    paths:
+      - 'tools/**'
+      - '.github/workflows/test-tools.yaml'
+  workflow_dispatch:
+jobs:
+  test:
+    strategy:
+      matrix:
+        node-version: [20.x, 22.x]
+        platform: [ubuntu-latest, macos-latest, windows-latest]
+    runs-on: ${{ matrix.platform }}
+    defaults:
+      run:
+        working-directory: tools
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v4
+    - name: Setup Node.js
+      uses: actions/setup-node@v4
+      with:
+        node-version: ${{ matrix.node-version }}
+        cache: 'npm'
+        cache-dependency-path: tools/package-lock.json
+    - name: Install dependencies
+      run: npm ci
+    - name: Build TypeScript
+      run: npm run build
+    - name: Run tests with coverage
+      run: npm test -- --coverage