chore: import upstream snapshot with attribution

.github/workflows/test-enginetests.yml

@@ -0,0 +1,47 @@
+name: Enginetests
+on: [pull_request]
+
+concurrency:
+  group: test-enginetests-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  test:
+    strategy:
+      fail-fast: false
+      matrix:
+        platform: [ubuntu-latest, macos-latest, windows-latest]
+    runs-on: ${{ matrix.platform }}
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v6
+    - name: Set up Go
+      uses: actions/setup-go@v5
+      with:
+        go-version-file: go.mod
+      id: go
+    - name: Install ICU4C (MacOS)
+      if: ${{ matrix.platform == 'macos-latest' }}
+      run: |
+        dir=$(brew --cellar icu4c)
+        dir="$dir"/$(ls "$dir")
+        echo CGO_CPPFLAGS=-I$dir/include >> $GITHUB_ENV
+        echo CGO_LDFLAGS=-L$dir/lib >> $GITHUB_ENV
+    - name: Install ICU4C (Windows)
+      if: ${{ matrix.platform == 'windows-latest' }}
+      uses: msys2/setup-msys2@v2
+      with:
+        path-type: inherit
+        msystem: UCRT64
+        pacboy: icu:p toolchain:p pkg-config:p
+    - name: Build SQL Syntax
+      run: ./build.sh
+      working-directory: ./postgres/parser
+      shell: bash
+    - name: Test (*nix)
+      if: ${{ matrix.platform != 'windows-latest' }}
+      run: go test --timeout=20m $(go list ./testing/go/enginetest)
+    - name: Test (Windows)
+      if: ${{ matrix.platform == 'windows-latest' }}
+      shell: msys2 {0}
+      run: go.exe test --timeout=20m $(go.exe list ./testing/go/enginetest)