PerRegionChat

- Added config option to add region restricted /teammsg and /tm commands

These commands will normally be used instead of the vanilla, but the vanilla ones are still accesible through /minecraft:teammsg and /minecraft:tm. To avoid this, remove the permission node minecraft.command.teammsg from players.

A server restart is recommended when changing this option from true to false, as /prc reload is not enough to disable the new commands.

- Changed the permission node for /prc reload from perregionchat.command to perregionchat.command.reload