feat: add no gap to Flex example

[BlackySoul]

Описание

Добавляем в пример возможность убрать проп gap

Release notes

Документация

• Flex: добавили возможность не задавать свойство gap

[github-actions]

👀 Docs deployed

• ✅ Styleguide
• ❌ Storybook

Commit a8c7fd0

[codesandbox-ci]

This pull request is automatically built and testable in CodeSandbox.

To see build info of the built libraries, click here or the icon next to each commit SHA.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.37%. Comparing base (e985501) to head (a8c7fd0).
Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #7899      +/-   ##
==========================================
+ Coverage   95.34%   95.37%   +0.03%     
==========================================
  Files         377      378       +1     
  Lines       11054    11154     +100     
  Branches     3673     3706      +33     
==========================================
+ Hits        10539    10638      +99     
- Misses        515      516       +1     

Flag	Coverage Δ
unittests	95.37% <ø> (+0.03%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.