Citizen Launcher 0.9.1

Maintenance/UX hotfix for the distro-neutral preview.

Removed mandatory PowerShell Core from base Winetricks setup.
Robust RSI Electron Builder latest.yml parsing (path, nested url, version fallback).
DXVK is included in automatic repair.
Responsive GUI with safer grid sizing and readable diagnostics.
Added regression tests for RSI metadata formats and the minimal prefix contract.