chore: add overflowhandler readme

[davidmenendez]

Closes https://github.com/carbon-design-system/ibm-products/issues/7632

Added a README.md in the overflowHandler folder. Includes a link to the storybook examples and documentation. The content is the same content found in the Storybook docs.

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Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 84.83%. Comparing base (ca4a022) to head (a375348). Report is 1 commits behind head on main.

Additional details and impacted files

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##             main   #19613   +/-   ##
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  Coverage   84.83%   84.83%           
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  Files         371      371           
  Lines       14763    14763           
  Branches     4871     4816   -55     
=======================================
  Hits        12524    12524           
- Misses       2089     2090    +1     
+ Partials      150      149    -1     

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[davidmenendez]

@adamalston thanks for the review! update based on your suggestions.

[adamalston]

The content is the same content found in the Storybook docs.

Should that content also be updated?

[davidmenendez]

The content is the same content found in the Storybook docs.

Should that content also be updated?

yes i will totally open a follow up PR in the other repo based on your suggestions. thanks!