fix(button/carousel): added DeepPartial Typing

[Ncookiez]

fix #646

Description

This PR just adds the DeepPartial type to optional custom themes for two components (Button & Carousel) that were missing that. For both, deep merging with the base theme was already setup.

Fixes #646

Type of change

• Bug fix (non-breaking change which fixes an issue)

Breaking changes

None.

How Has This Been Tested?

Just the regular tests with yarn test, and linting tests with prettier and eslint.

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules
• I have checked my code and corrected any misspellings

[codecov]

Codecov Report

Patch coverage: 100.00% and no project coverage change

Comparison is base (ed74d13) 99.42% compared to head (ee5abef) 99.42%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #649   +/-   ##
=======================================
  Coverage   99.42%   99.42%           
=======================================
  Files         130      130           
  Lines        6411     6413    +2     
  Branches      477      477           
=======================================
+ Hits         6374     6376    +2     
  Misses         37       37           

Impacted Files	Coverage Δ
src/lib/components/Button/Button.tsx	100.00% <100.00%> (ø)
src/lib/components/Carousel/Carousel.tsx	98.97% <100.00%> (+<0.01%)	⬆️

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[tulup-conner]

Perfect, thank you