Addon-docs: Fix Memo React components in ArgsTable

[andezzat]

Issues: #8894 #9586

Storybook seems to be missing correct exotic component type extraction.
For Forward Ref, if the wrapped component has propTypes defined, it will work, but if it doesn't while the inner render fn does, it won't work.
For Memo, it doesn't work at all.

What I did

• Created React lib helpers for isMemo & isForwardRef (cannot use react-is counterpart as they always expect Elements not Components)
• Refactored jsxDecorator to use new helpers & fetch .__docgen.displayName if available!
• Fixed extractProps so it can get types from Memo render fn
• Consolidated example exotic components
• Updated stories to reflect new behaviour

NOTE: Unfortunately, docgen doesn't work properly if you try to attach propTypes to the wrapped Memo component, it can only work when the Memo's inner/render fn itself has propTypes attached.

How to test

• Is this testable with Jest or Chromatic screenshots?
  No?
• Does this need a new example in the kitchen sink apps?
  Yes, added new stories on official-storybook app.
• Does this need an update to the documentation?
  No.

If your answer is yes to any of these, please make sure to include it in your PR.