[FIX] Resolve "Buffer is undefined" Error in Webpack Configuration

[SushilMallRC]

Description:

This merge request addresses the "Buffer is undefined" error encountered during the Webpack build process. The issue was caused by Webpack 5 no longer including polyfills by default. The following changes have been made:

• Added Buffer polyfill using ProvidePlugin in Webpack configuration.
• Included process/browser polyfill to handle the process object in the browser.

Impact:

These changes ensure that the project builds correctly with Webpack 5, avoiding runtime errors related to Buffer and process.

[coveralls]

coverage: 92.868%. remained the same
when pulling e69a18f on RC-269
into 28b7a6b on master.