Replace deprecated Uglify with Terser for modern JS compatibility

[nandini888-hash]

This PR replaces the deprecated Uglify-based minification setup with Terser to ensure compatibility with modern JavaScript (ES6+).

Key updates include:

1. Removed uglifyjs-webpack-plugin
2. Added and configured terser-webpack-plugin
3. Updated Webpack configuration to use Terser for minification

Motivation :
uglifyjs-webpack-plugin is deprecated and does not fully support modern JavaScript features. This was causing build failures and compatibility issues.
Changes Made:

1. Removed deprecated uglifyjs-webpack-plugin
2. Installed terser-webpack-plugin
3. Updated Webpack config:
4. Replaced Uglify with Terser in optimization.minimizer

Testing

• Installed dependencies (npm install)
• Tests pass (npm test)
• Applied NODE_OPTIONS=--openssl-legacy-provider to fix build issue
• npm run serve

Disclosure :
Mostly AI-generated

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you all sign our Contributor License Agreement before we can accept your contribution.
1 out of 2 committers have signed the CLA.

✅ nandini888-hash
❌ Nandini Vijay

---

Nandini Vijay seems not to be a GitHub user. You need a GitHub account to be able to sign the CLA. If you have already a GitHub account, please add the email address used for this commit to your account.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}