[Xarishark]

Hi! This adds a recomplauncher.json so RecompLauncher can set up, configure and start Unleashed Recompiled for players.

What players get

• Easy Setup: they pick their disc image or folder (USA or Europe), their title update and any DLC they own. The launcher checks the copy, installs the game files and starts the game.
• Verified badge: the USA and Europe discs are matched against Redump (size and CRC32), so clean dumps are marked as verified.
• Settings in the launcher: 20 settings (language, window, resolution scale, frame rate, anti-aliasing, shadows, controller options and more), written to the game's own config.toml. The location follows portable.txt, like the game does.
• Saves are found for backups and cloud saves.

Code change (its own commit, UnleashedRecomp/main.cpp)
A new opt-in --prepare option: --prepare --game <path> --update <path> [--dlc <path>]... runs the existing installer without a window, prints progress <0-1> <text> lines and exits (0 on success). It reuses Installer::parseSources, install and rollback. Without --prepare nothing changes: the game starts and the installer wizard works exactly as before.

Releases
The Windows release folder and the Linux artifact now include recomplauncher.json next to the executable (small changes to the "Pack Release" steps in validate.yml).

No game files are added, and gameplay, graphics, saves and the config format are untouched.

Note: the Redump values come from redump.org (Sonic Unleashed: USA ea27d841, Europe 5cd5ccdd, both 7835492352 bytes). --prepare hasn't been compiled or run on my side, so a build check from CI or a maintainer would be welcome.