Using `--window` in a `wt` action should do what you'd expect

(from 1:1)

right now, `TerminalPage::_HandleExecuteCommandline`/`TerminalPage::ConvertExecuteCommandlineToActions` just tries to get the actions from the commandline, and tries to execute them. It would be _really neat_ if we could determine that `--window _quake` was passed in that commandline, and toss the actions to the window you'd expect.

If there's no provided `--window`, then just execute the commandline in the current window. Otherwise, send the commandline to the monarch, and let them deal with it.

That would mean the command palette could get this functionality for commandline mode as well.

Start with TerminalPage::_HandleExecuteCommandline and TerminalPage::ConvertExecuteCommandlineToActions, which currently execute actions from the command line. Trace how the monarch receives commands and confirm that --window _quake is routed to the requested window, while commands without --window still execute in the current window and command-palette command-line mode gains the same behavior.

Written by the indexing model from the issue text.