added markDown Feature

[dmorton714]

• closes added markDown Feature #60004 ? (Replace xxxx with the GitHub issue number)
• Tests added and passed if fixing a bug or adding a new feature
  • I'm not sure if you have how you implement into the code base so I just gave use case examples
• All code checks passed.
• Added type annotations to new arguments/methods/functions.
• Added an entry in the latest doc/source/whatsnew/vX.X.X.rst file if fixing a bug or adding a new feature.

I am new to adding features and working with anything this extensive. I didn't realize to_markdown() was a function so I made my own. It also doesn't require tabulate and is around 40% fasters in my tests. Looking forward to any feedback.

[mroeschke]

Thanks for the PR, but we would require an issue to discuss the feature request (replacing tablulate with your implementation). This PR would also need to demonstrate that your function passes all the markdown tests.

IMO it's probably unlikely that this would be accepted into pandas since this would incur maintenance burden which was handled by tabulate. Might I suggest submitting a pull request to tabulate proposing your performance improvements