Non-standard OSC to get the terminal app

[trajano]

OSC 52 allows pasting assuming it is allowed by Windows Terminal so that at least gives prior work that shows OSC can be used to get data from the local machine.

I was wondering if it is possible to add something like a non-standard OSC code that would yield the name of the terminal app or allow querying the terminal app as using the WT_SESSION environment variable is won't work over SSH like in moor

https://github.com/walles/moor/blob/36e76c6caa17bc16ad0ebc6174c1fe2b2925fae9/twin/screen.go#L374

Something like OSC XX will force typing WindowsTerminal\0 by Windows terminal.

The querying would be

OSC XX WindowsTerminal;Hyper;; and force typing \1 if it matches. The only restriction that should be put in place is the escape sequence must be less than 80-characters,