forked from EXTERNAL/bareiron

* Added sending player metadata with poses to everyone * Renamed sendPlayerMetadataToAll to broadcastPlayerMetadata * Made entity metadata system flexible * Made broadcastPlayerMetadata create new metadata instead of using a global one * Moved writeEntityData, sizeEntityData and sizeEntityMetadata to procedures * style nitpicks --------- Co-authored-by: p2r3 <p2r3@p2r3.com>