fix: add import type in index file

Author: Thanga-Ganapathy

.changeset/twelve-terms-impress.md

@@ -0,0 +1,5 @@
+---
+"@opentf/obj-diff": minor
+---
+
+Added import types in index file.

packages/obj-diff/src/diff.ts

@@ -1,10 +1,5 @@
 import { ADDED, CHANGED, DELETED } from "./constants";
-
-export type DiffResult = {
-  t: 0 | 1 | 2;
-  p: Array<string | number>;
-  v?: unknown;
-};
+import { DiffResult } from "./types";
 
 function objDiff(
   a: object,

packages/obj-diff/src/index.ts

@@ -1,3 +1,4 @@
 import diff from "./diff";
+import type { DiffResult } from "./types";
 
-export { diff };
+export { diff, DiffResult };

packages/obj-diff/src/types.ts

@@ -0,0 +1,5 @@
+export type DiffResult = {
+  t: 0 | 1 | 2;
+  p: Array<string | number>;
+  v?: unknown;
+};