Add a Remote Viewer.app that registers as a handler for .vv connection
files. The app is built as an AppleScript droplet that copies the file
to a temporary location (for quarantine compatibility) and launches
remote-viewer. The original file is removed if it contains
delete-this-file=1 (as remote-viewer does itself).
Includes an +app_as_root variant that prompts for administrator
privileges before launching. This is less secure but needed for USB
forwarding.