relauncher

General bug fixing, added tests and added java runtime configs It is now possible to set wanted major java versions and vendors for the mod, alongside with java downloader using foojay disco if no compatible runtime is found. Curseforge release won't ship the downloader and instead will ask the user to manually install the wanted java version. Mods can ship a java provider and java requirements similar to the command line provider.

Fixed race crash/use after free with hiding early window.