Fix duplicate styles when Components are used multiple times

[wakaztahir]

• Method 1 : Fix by caching styles on server side

  • Unique hash string map method doesn't work
  • Can't figure out how to mount a child once and ignore multiple invocations

• Method 2 : Fix by extracting styles (Very hard & time consuming)

  • Find the usages of styled
  • Hash & extract the CSS styles
  • Give unique class name to component along with user given class name
  • Styles after being hashed should be put into document or include it as a File (head or body)
  • Once done, support styled options & withComponent
  • Support Global Styles