XCOTA TAG V5.2 gameplay repairs

Drag clean XCOTA Euro 950331 and MVC1 Euro 980123 ZIPs together onto
BUILD XCOTA V5.2.cmd. The builder runs in vanilla Windows PowerShell 5.1 with inbox .NET.
Players need no Python, SDK or compiler installation. Clean input ZIPs
are verified and never changed. The default output is in output/.
Merged XCOTA/MVC1 ZIPs with the complete Euro parent at the root and
regional clones in their usual subfolders are supported. Only the verified
parent members are used; clone files stay inside your original ZIPs.
Wrapped game folders and small desktop metadata are supported. Duplicate
ROM names, changed ROM contents and complete ROM collections are refused.
Load stock xmcota.zip with the existing XCOTA driver. MAME also needs
the clean qsound_hle.zip BIOS in its ROM search path. Patched-game
checksum warnings are expected; missing dl-1425.bin is a BIOS error.
The patch recipes contain authored instructions and donor source coordinates;
no ROM ZIP, encryption key or donor sprite bytes are distributed here.
