refactor(interactive): Add format check for Flex Interactive code

[zhanglei1949]

Implement format and style checks for C++ and Python code in Flex Interactive; Java checks are already in place.

Fix #4270

[github-actions]

Please check the preview of the documentation changes at
https://e7f485cc.graphscope-docs-preview.pages.dev

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 58.78%. Comparing base (1b4b809) to head (294d494).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4272   +/-   ##
=======================================
  Coverage   58.78%   58.78%           
=======================================
  Files          12       12           
  Lines         592      592           
=======================================
  Hits          348      348           
  Misses        244      244           

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