[SyntaxTree] I reworked the Syntax Tree to support indentation and made logging polymorphic.
[Parser][Refactor] I refactored all of the parser to use terser ExpressionTreePtr.
[Tokenizer][Refactor]Refactored tokenizer to use std.
[Parser][Refactor] minor refactor.
Updated Xcode settings.
[Tokenizer][Major] I reworked most of the tokenizer.
It is now more modularized
It now supports indentation
It now returns eof tokens
It is re-indented  (2 spaces)
[Syntax Tree][refactor]I refactored the syntax tree two 2 spaces.
[Main][Refactor] I refactored the main to 2 spaces
[Xcode][Add] I am adding some kind of Xcode file related to the source control.