Added Infinite Scrolling and Previous Item Persistence in Notifications

[shauryag2002]

Proposed Changes

• Fixes Infinite Scrolling and Previous Item Persistence in Notifications #8770
• Implement infinite scrolling for the notifications list.
• Ensure previous notifications are still available and new notifications append at the end of the list.
• Clear and replace the existing list of notifications when the event filter is changed.

Video of changes:

infinite-scroll-notification.mp4

@ohcnetwork/care-fe-code-reviewers

Merge Checklist

• Add specs that demonstrate bug / test a new feature.
• Update product documentation.
• Ensure that UI text is kept in I18n files.
• Prep screenshot or demo video for changelog entry, and attach it to issue.
• Request for Peer Reviews
• Completion of QA

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[nihal467]

@shauryag2002

• currently we are having two loader in the notification, remove one among the two loader for the infinite loading