Adds geysermc to cross platform readme
Geyser is actually cross platform, not just bedrock. Also, dragonproxy is entirely abandoned in favour of geyser so removed all instances of dragonproxy and just left a msg saying use geyser in the top level readme.
config files pulled from this repo have their url's updated in the eggs
restructured the minecraft proxy folder and added a geysermc readme to indicate the geyser official eggs. updated readmes to match.