docs: add default sticky banner example to StoryBook

[MateoWartelle]

• I have followed the Your First Code Contribution section of the Contributing guide

Summarize the changes made and the motivation behind them.

Reference related issues using # followed by the issue number.
#967

If there are breaking API changes - like adding or removing props, or changing the structure of the theme - describe them, and provide steps to update existing code.

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Name	Status	Preview	Comments	Updated (UTC)
flowbite-react	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Sep 22, 2023 0:56am

[codecov]

Codecov Report

Patch coverage: 71.68% and project coverage change: -6.03% ⚠️

Comparison is base (7461173) 99.54% compared to head (397f1d0) 93.52%.
Report is 83 commits behind head on main.

❗ Current head 397f1d0 differs from pull request most recent head 2191c76. Consider uploading reports for the commit 2191c76 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #980      +/-   ##
==========================================
- Coverage   99.54%   93.52%   -6.03%     
==========================================
  Files         163      182      +19     
  Lines        6621     7892    +1271     
  Branches      401      439      +38     
==========================================
+ Hits         6591     7381     +790     
- Misses         30      511     +481     

Files Changed	Coverage Δ
src/components/Pagination/helpers.ts	100.00% <ø> (ø)
src/components/Toast/theme.ts	100.00% <ø> (ø)
src/components/Datepicker/Datepicker.tsx	28.43% <28.43%> (ø)
src/components/Datepicker/Views/Days.tsx	36.00% <36.00%> (ø)
src/components/Datepicker/Views/Decades.tsx	37.70% <37.70%> (ø)
src/components/Datepicker/Views/Months.tsx	37.70% <37.70%> (ø)
src/components/Datepicker/Views/Years.tsx	37.70% <37.70%> (ø)
src/components/Banner/BannerCollapseButton.tsx	40.90% <40.90%> (ø)
src/components/Datepicker/helpers.ts	60.13% <60.13%> (ø)
src/components/Banner/Banner.tsx	64.70% <64.70%> (ø)
... and 45 more

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