Cleaned up code, made another file for the tokenization(lexer) almost at parsing tree (

[ SOURCE CODE ]
│

1. ▼ LEXICAL ANALYSIS (Tokenizer) ◄─── finished here
   [ TOKEN STREAM ]
   │
2. ▼ SYNTAX ANALYSIS (Parser)
   [ ABSTRACT SYNTAX TREE (AST) ]
   │
3. ▼ SEMANTIC ANALYSIS (Type Checker)
   [ DECORATED AST ]
   │
4. ▼ INTERMEDIATE CODE GENERATION (IR)
   [ IR CODE ] (e.g., Three-Address Code, Bytecode)
   │
5. ▼ CODE OPTIMIZATION
   [ OPTIMIZED IR ]
   │
6. ▼ TARGET CODE GENERATION
   [ MACHINE CODE / ASSEMBLY ] (Final Executable)

“there are two types of programmers - those who have written a compiler and those who haven’t”
-Terry Davis