[Styling] UI/UX Milestone 3

[mahalakshme]

Design
System Guidelines
LFE Koita redesign suggestions (for reference)

The above are links for the redesign of specific screens on the UI. While our objective is not to make all the changes suggested, we will be picking up some of these changes in this iteration. Specific changes below.

Tasks

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1. UI improvements for profile page avni-client#1361
2. Subject Dashboard UI revamp avni-client#1371
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3. UI improvements for report cards avni-client#1362
4. Landing screen UI revamp avni-client#1370
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5. UI improvements in subject listing page avni-client#1368
6. Search Results UI revamp avni-client#1372
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