1.0.0 config changes

[John-Paul-R]

• Enable PERSIST_BACK_LOCATION by default
• RESPAWN_AT_EC_SPAWN defaults to NoBed

[John-Paul-R]

oh, and TOML. I want to switch to TOML or JSON for config-persist

[John-Paul-R]

RTP configuration should be a per-world object, something like this

enabled: bool
radius: int..int (using MC's range notation - can also just be a single number) - ah, but toml, idk what type of literal this'd be.. maybe accept string in that form or [int, int], or int
center: point2i? (default to 0,0) - (preferring this to `spawn`... maybe.. not sure yet) - allow setting via command
cooldown_override: int?

also, default enable both overworld and the_nether, but set the default radius to 1/8 the overworld for the nether.