feat : Added boxplot stats as tooltip for axis label

[rishisulakhe]

Fix cBioPortal/cbioportal#11245

Describe changes proposed in this pull request:

• Added Axis Label Hover Events: Implement event handlers for axis labels to trigger tooltips when hovered.
• These changes allow users to view box plot statistics by hovering over both the box plot and the axis labels.

Checks

• [✓ ] Has tests or has a separate issue that describes the types of test that should be created. If no test is included it should explicitly be mentioned in the PR why there is no test.
• [ ✓] The commit log is comprehensible. It follows 7 rules of great commit messages. For most PRs a single commit should suffice, in some cases multiple topical commits can be useful. During review it is ok to see tiny commits (e.g. Fix reviewer comments), but right before the code gets merged to master or rc branch, any such commits should be squashed since they are useless to the other developers. Definitely avoid merge commits, use rebase instead.
• [✓ ] Is this PR adding logic based on one or more clinical attributes? If yes, please make sure validation for this attribute is also present in the data validation / data loading layers (in backend repo) and documented in File-Formats Clinical data section!

Any screenshots or GIFs?

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[rishisulakhe]

Hello @alisman
Please take a look at this PR and suggest any required changes
Thankyou.

[alisman]

@rishisulakhe thank you for doing this. can you rebase (and resolve conflicts)?

[alisman]

see if there is any way to consolidate this code with the implementation that does the same thing for the box plots themselves.

[alisman]

@rishisulakhe i tested this and looks good. just respond to the above.

[rishisulakhe]

Working on this , will commit very soon

[alisman]

see note

[alisman]

@rishisulakhe thanks. merged