New lexer engine

[PrivateGER]

The current lexer is bad. Very bad.
Implement a better system to accurately parse GreenLight code and create syntax objects for the transpiler.

Breaking changes are allowed, but discouraged. This will likely require rewriting of a large amount of code.

[klee214]

Hello, I would like to handle this issue for my school assignment.

[PrivateGER]

Alright, assigned to you. :)