refactor: remove notistack from project

[arbisoft-qaisarirfan]

PR Description: Remove notistack from the Project

Summary

This PR removes the notistack package from the project as it is no longer needed. All instances of notistack have been removed, and the notification system has been refactored where necessary.

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Changes Implemented

✅ Uninstalled notistack from the project:

npm uninstall notistack

✅ Removed all imports and usage of notistack across the codebase.

✅ Refactored notification logic to use an alternative:

• Material UI Snackbar

✅ Tested the application to ensure no errors occur due to the removal of notistack.

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How to Test

1️⃣ Pull the branch and install dependencies

git pull origin <branch-name>
npm install

2️⃣ Run the application and check notifications

npm start

3️⃣ Verify that there are no missing dependency errors related to notistack.

4️⃣ Ensure notifications work correctly using the new approach.

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Impact

• Removes an unnecessary dependency, reducing bundle size.
• Ensures a cleaner and more maintainable codebase.
• Prevents potential compatibility issues with future updates.

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Link to the associated Taiga ticket: https://projects.arbisoft.com/project/arbisoft-sessions-portal-20/us/67

✅ Ready for review! 🚀

[farhan2742]

LGTM