Hand the terminal launcher the focused window's pid from Lua (#13521)

To open a new terminal in the focused terminal's directory, the launcher
asked Hyprland for the active window with hyprctl, ~10ms on every
SUPER+RETURN. The binding now reads the pid from hl.get_active_window() and
passes it as --pid. Without one, from the menu or a shell, the launcher asks
Hyprland as before.

The bind is now a Lua function, which Hyprland reports only as __lua, so
o.bind_commands records the command it stands for and the keybindings menu
still launches a terminal when the entry is picked.

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

default/hypr/bindings/applications.lua

@@ -1,5 +1,5 @@
 -- Essential application bindings.
-o.bind("SUPER + RETURN", "Terminal", { omarchy = "terminal" })
+o.bind("SUPER + RETURN", "Terminal", o.launch_terminal())
 o.bind("SUPER + SHIFT + RETURN", "Browser", { omarchy = "browser" })
 o.bind("SUPER + SHIFT + F", "File manager", { omarchy = "nautilus" })
 o.bind("SUPER + ALT + SHIFT + F", "File manager (cwd)", { omarchy = "nautilus-cwd" })