[82, 69, 107, 62] `MentorshipCard`, `MenteeCard`, `RequestsCard`, and `ApplicationsCard` redesign

[lorepirri]

What Github issue does this PR relate to?

• Close #82
• Close #69
• Close #107
• Close #62

Changes proposed in this pull request:

• major redesign of MentorshipCard, MenteeCard, RequestsCard, and ApplicationsCard

What should the reviewer know?

Try all.

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[lorepirri]

thanks @maranta1 for reviewing it! I've addressed all your comments, merging now