Mimic Mod

- make spawned mimics instantly replace chests so they don't blow up desert temples.

- config for mimic spawn chance. edit mimicSpawnChance in world/serverconfig/mimic-server.toml. When a chest is generated in a supported structure it will have a 1/x chance of being a mimic. Higher value means fewer mimics. A value of 1 means always a mimic.

- fix log spam.