Idempotent helper that copies the client to a writable location,
creates a fresh Wine prefix, and installs the required winetricks verbs
(vcrun2022, d3dx9, corefonts, tahoma). Re-running on an existing target
skips already-done steps.
Document the interim path for running the Windows client on Linux via
Wine, verified to reach character selection on Fedora 41 with Wine 10
Staging. Main gotcha: winetricks tahoma is mandatory because the client
hard-codes Tahoma as the UI font, and without it all text renders
invisibly even though layouts are correct.
