docs: Add note regarding local testing (#89)

* docs: cautious note for local testing improvement

* lint

Author: twishabansal

packages/toolbox-core/DEVELOPER.md

@@ -68,6 +68,10 @@ These steps will guide you through setting up the monorepo and this specific pac
 
     Don't forget to `npm unlink` when done!
 
+   **Note**: At times, due to dependency conflicts, `npm link` might not work as
+   expected. In such cases, it is advised to pack  your package using `npm pack`
+   and then use it in another package.
+
 ## Testing
 
 Ensure all tests pass before submitting your changes. Tests are typically run from within the `packages/toolbox-core` directory.