Refactor states.rb and grammar.rb

[alitaso345]

Summary

• I have refactored states.rb and grammar.rb.
• Groups of Structs with methods have been separated into different files as Classes inheriting from Struct.

Changes Made

• states.rb
  • The Item has been separated into a different file.
• grammar.rb
  • The following Structs have been separated into different files:
  • Code, ErrorToken, Precedence, Printer, Reference, Rule, Symbol, Union

[yui-knk]

Thank you!