Essential-Commands

eaf58b58 - Several changes. (see full commit description)

Several changes. (see full commit description) - Revert EssentialCommands.java - Notably, do not auto-convert unconditionally on server start. - Add `convertEssentialsXWarps` command, backed by `EssentialsConvertor.warpConvert` - Rework `EssentialsConverter` methods to not be dependent on static global fields for `SERVER_INSTANCE` and `WORLD_LIST` - minor formatting & log message format in `EssentialsConverter` - do not rename/rewrite EssentialsX files after conversion. - (I essentially consider these "not our files", so I don't want to touch them)