feat(ResultHandler): add type that represents function to handle the result of the ResultCallback function before its result returns with optional payload.

Author: sciborrudnicki

src/type/result-handler.type.ts

@@ -1,4 +1,10 @@
 /**
- * Function to handle the result of the `ResultCallback` function before its result returns.
+ * Function to handle the result of the `ResultCallback` function before its result returns with optional payload.
  */
-export type ResultHandler = (result: boolean, value: any) => void;
+export type ResultHandler<Payload extends object = any> = (
+  // Result of the callback.
+  result: boolean,
+
+  // An optional object to provide more data.
+  payload?: Payload
+) => void;