Support for iTerm2's color-changing control sequences

[akx]

iTerm2 supports some proprietary control codes to change the current session's color palette and window chrome colors.

My sshw tool uses these codes to automatically set the session's background/text colors so you know you're ssh'd into a production server, etc.

These codes, or at least not the forms I'm using, don't seem to be presently supported.

Would be nice if they were, or if there already is an alternative for these in Ghostty (I did skim https://ghostty.org/docs/vt/reference), that'd be nice to know.

[hartzell]

Along the same lines, in iTerm, I routinely run commands at the prompt to set the theme to something distinct in windows that I want to stand out:

echo -e "\033]1337;SetColors=preset=Grass\a"

[pluiedev]

Not supported yet. We do support changing palette colors via OSC 4 but we don't have the notion of presets or profiles. Changing the appearance of Ghostty itself is tracked by #2353.