Edit code based on user's input
The `edit_code` function prompts the user to provide a plain English description of how the code in a given file should be modified. The function then generates the modified code based on the user's input and writes it back to the specified file.
A character string representing the name of the file containing the code to be edited.
An optional character string representing the chatlog ID. Defaults to ".__CURRENTCODEFILE__". This ID is used to maintain the conversation history with the AI.
Additional arguments to pass to the chat_completion() function.