Added multiple views for the functioning of new fusion-frontend dashboard

[Pratik2026]

Co-authored By: @uphadeharsh45 & @AkashPaloju

This commit includes the necessary changes required for the functioning of the new fusion-frontend dashboard. Following are the changes made:

• Made a new auth_view to retrieve the user info like name, list of designations, accessible_modules and last_selected role.
• Removed the dashboard view as we already have notification view to fetch notifications and auth view for user info.
• Added views for notification read, unread and delete functionality
• Added a new attribute named last_selected_role in extra_info model to track the last selected role by the user.

Types of changes

• [] Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Other (please describe):

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have created new branch for this pull request
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• My changes does not break the current system and it passes all the current test cases.

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