Terminal · build on Windows: set alacritty's Windows-only escape_args

alacritty_terminal 0.26's tty::Options has a field that exists only on
Windows, so the crate failed to compile there with E0063. Each launch
argument is one argv entry, so they are escaped by the C runtime rules.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/terminal/pty.rs

@@ -83,6 +83,8 @@ pub(crate) fn spawn(launch: &Launch, size: TermSize, cell: (u16, u16)) -> anyhow
         working_directory: launch.cwd.clone(),
         drain_on_exit: true,
         env,
+        #[cfg(target_os = "windows")]
+        escape_args: true,
     };
     let pty = tty::new(&options, window_size(&size, cell), 0)?;
     let event_loop = EventLoop::new(term.clone(), listener, pty, true, false)?;