Function encode 

pub fn encode(data: &mut [u8], bracketed: bool, buf: &mut [u8]) -> Result<usize>

Encode paste data for writing to the terminal pty.

This function prepares paste data for terminal input by:

• Stripping unsafe control bytes (NUL, ESC, DEL, etc.) by replacing them with spaces
• Wrapping the data in bracketed paste sequences if bracketed is true
• Replacing newlines with carriage returns if bracketed is false

The input data buffer is modified in place during encoding. The encoded result (potentially with bracketed paste prefix/suffix) is written to the output buffer.

If the output buffer is too small, the function returns Err(Error::OutOfSpace { required }) where required is the required The caller can then retry with a sufficiently sized buffer.