Added more examples to the docs

[piotrpospiech]

• added more examples to docs
  • custom form layout
  • passing props via schema
  • passing props via components
• removed duplicated comparison matrix from docs (removed displaying it as a page as it is only a component used in the landing page)
• improved code editor in the examples (disabled table of contents for more space, adjusted height)
• created CodeEditorTabs to reduce redundancy
• added migration guide v2 to v3 from old docs

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.53%. Comparing base (ef088ef) to head (69b611c).

Additional details and impacted files

@@           Coverage Diff           @@
##             docs    #1388   +/-   ##
=======================================
  Coverage   95.53%   95.53%           
=======================================
  Files         175      175           
  Lines        2867     2867           
  Branches      773      773           
=======================================
  Hits         2739     2739           
  Misses         59       59           
  Partials       69       69           

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