chore: import upstream snapshot with attribution

apps/webapp/app/components/code/tsql/index.ts

@@ -0,0 +1,10 @@
+// TSQL CodeMirror support
+// Provides syntax highlighting, autocompletion, and linting for TSQL queries
+
+export { createTSQLCompletion } from "./tsqlCompletion";
+export {
+  createTSQLLinter,
+  isValidTSQLQuery,
+  getTSQLError,
+  type TSQLLinterConfig,
+} from "./tsqlLinter";