feat: parser unit tests

Author: AbhinavKumar-sf

src/utils/apex/parser/apexparser.ts

@@ -2,7 +2,7 @@
 /* eslint-disable @typescript-eslint/no-unsafe-call */
 /* eslint-disable @typescript-eslint/no-unsafe-member-access */
 /* eslint-disable @typescript-eslint/no-unsafe-assignment */
-import fs from 'fs';
+import * as fs from 'fs';
 import {
   ApexLexer,
   CommonTokenStream,