Add the ability to name/re-name a window

[joshuaboys]

I know I am finding myself running more and more windows (made up of many tabs.. regularly hitting a ghostty limit I didn't know existed) these days and it would be such a quality of life improvement to be able to rename the windows themselves.

I've looked into it from a Linux perspective and it doesn't look like a huge amount of effort. Basically we copy the existing prompt_surface_title implementation approach but at the Tab level instead of Surface level. (its an oversimplification but that is the core part)

[jcollie]

#10469