…with token stream handling using peek and next methods for improved clarity and flexibility

… for more efficient token processing, improving readability and handling of token types

…oving unnecessary index tracking

…accept a mutable Peekable iterator for token processing, replacing the token slice approach

…std::slice for token iteration in the extract_parameters function

…okens using a Peekable iterator, extracting the function name, parameters, and body

…it with the updated version of extract_parameters that accepts a mutable Peekable iterator

…eekable iterator (peekable_tokens) instead of a token slice

Refactor Token Parsing and Parameter Extraction Logic for Improved Clarity