Function read_file 

pub fn read_file(directory: &str, file_name: &str) -> Result<String>

Reads the content of a file in a specific directory and returns it as a string.

Arguments

• directory - The path to the directory where the file is located.
• file_name - The name of the file to read.

Returns

• Ok(String) containing the file’s content.
• Err(io::Error) if an error occurs.