Function extract_code_from_text 

pub fn extract_code_from_text(
    text: &str,
    delimiters: &[(String, String)],
) -> Option<(String, String)>

Extract the first code block from text content using the given delimiters.

Returns Some((code, remaining_text)) where code is the extracted code and remaining_text is the original text with the code block removed. Returns None if no code block is found.