Fix: Truncated Name in big repos

[lrongyi]

Summary:

Fixes #481

Type of change:

• ✨ New Feature/ Enhancement

Changes Made:

• Hovering over username will show a tooltip such that the user can view the full GitHub username, without needing to go to GitHub

Screenshots:

Proposed Commit Message:

Add tooltip to show full GitHub username on hover in card view

Long GitHub usernames are truncated with ellipses in the card view. 

This change adds a tooltip that displays the full username when 
hovered over, improving usability and clarity.

Checklist:

• I have tested my changes thoroughly.
• I have created tests for any new code files created in this PR or provided a link to a issue/PR that addresses this.
• I have added or modified code comments to improve code readability where necessary.
• I have updated the project's documentation as necessary.

[NorbertLoh]

Personally, I prefer just the name but if anyone prefers with the 'username: ' in #488. Please let me know. @lrongyi good job on the clear on concise PR. However, perhaps a more detailed git commit message will be better. You can see the format to follow at se-edu 'Commit message: Body' or previous PRs. Otherwise LGTM!

[NorbertLoh]

LGTM! Please pull from the latest branch, and I will merge it. Thanks 👍