Added an index file so the code can be consumed.

Author: jacksierkstra

src/index.ts

@@ -0,0 +1,4 @@
+export { Validator, ValidatorImpl } from "@lib/validator/validator";
+export { XMLParser } from "@lib/xml/parser";
+export { XSDParser } from "@lib/xsd/parser";
+export { ValidationResult } from "@lib/types/validation";