PLANNED_MILESTONES_FOR_NETCODE.md

In the CocosCreator version, I had a real struggle figuring out what features are necessary for a smooth multiplayer experience and in what order should they be implemented.

Here's the order of the necessary steps for taking the "(relatively) easy mode" this time.

1. No recovery upon reconnection & Websocket Only + Lockstep
   • No BackendDynamics is needed in this version
   • We need the RoomManager on backend to put connected players into correct rooms
   • We need the prediction algorithm of change#1 & change#2 to help frontend predict movements smoothly
   • We need the Lockstep-ish implementation in spot#1 & spot#2 to cope with the potential avalanche from ACTIVE SLOW TICKER in ConcerningEdgeCases
2. Add UDP capability (including the backend tunnel)
3. Add BackendDynamics & type#1 & type#2 force confirmation