Update .gitignore, add dist directory

dist/utils/sql-generator-grab-concat-str.d.ts

@@ -0,0 +1,8 @@
+type Param = {
+    field: string;
+    alias: string;
+    separator?: string;
+    distinct?: boolean;
+};
+export default function sqlGenGrabConcatStr({ alias, field, separator, distinct, }: Param): string;
+export {};