xtool uninstall exits 0 when the uninstall fails #354

xtool uninstall prints the failure and then exits with status 0, so scripts can't tell whether the uninstall actually happened.

Sources/XToolSupport/UninstallCommand.swift:24-33:

do {
    try await installProxy.uninstall(
        bundleID: bundleID,
        progress: { _ in }
    )
} catch {
    print("Failed: \(error)")
    return            // process exits with status 0
}
print("Success!")

Compare xtool install (Sources/XToolSupport/InstallCommand.swift:39-44), xtool dev run (DevCommand.swift:271-276) and xtool dev build --sign (DevCommand.swift:172-177), which all print the error and then throw ExitCode.failure.

The fix is to throw ExitCode.failure in the catch instead of return, matching the other device commands.

Impact: any automation that chains xtool uninstall && xtool install … or gates on the exit code gets success even when the app is still installed (wrong bundle ID given, device connection dropped mid-uninstall, lockdown error, etc.).