Remove Deprecated abab Package and Switch to Native atob()/btoa() Methods

[jaganvarun059]

Description:

This PR removes the deprecated abab package as it is no longer maintained. The functionality previously provided by abab is now replaced with the native atob() and btoa() methods available in the platform.

https://www.npmjs.com/package/abab

Changes:

Removed the abab package from dependencies.
Replaced usage of abab with the platform's native atob() and btoa() methods.
Reasoning:
The abab package has been deprecated, and using native methods improves performance and reduces external dependencies.

Testing:

Verified that the application works correctly with atob() and btoa() for encoding and decoding.

[jcbrand]

Thanks!