create static check github action for src, parser and examples

.github/workflows/static-checks.yml

@@ -0,0 +1,37 @@
+name: TypeScript & EsLint & Tests - subdirectories
+on:
+  pull_request:
+  merge_group:
+    branches:
+      - main
+  push:
+    # commented out for test purposes
+    # branches:
+    #   - main
+jobs:
+  static-analysis:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix: {dir: ['parser', 'example', 'WebExample', 'src']}
+    steps:
+      - uses: actions/checkout@v4
+      - name: Use Node.js 18
+        uses: actions/setup-node@v4
+        with:
+          node-version: 18
+      - name: Install root node dependencies
+        run: yarn
+      - name: Install ${{ matrix.dir }} app node dependencies
+        if: ${{ matrix.dir != 'example' || matrix.dir != 'src' }}
+        working-directory: ${{ matrix.dir }}
+        run: npm ci
+      - name: Check types
+        working-directory: ${{ matrix.dir }}
+        run: npx tsc -p ./tsconfig.json --noEmit
+      - name: Lint
+        run: yarn lint:${{ matrix.dir }}
+      - name: run tests
+        # no tests inside example and WebExample   
+        if: ${{ matrix.dir != 'example' || matrix.dir != 'WebExample' }}
+        working-directory: ${{ matrix.dir }}
+        run: npm run tests