Add token, AST, and lexer packages for ClickHouse parser (#2)

Author: kyleconroy

.github/workflows/test.yml

@@ -0,0 +1,24 @@
+name: Test
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: '1.25'
+
+      - name: Build
+        run: go build ./...
+
+      - name: Test
+        run: go test -v ./...