Only use the amount of memory needed in sharedbuffergeometry based on networked-drawing configuration. Only create a sharedbuffergeometry object when a pen is first spawned.
Also, reduce the amount of memory used by primitive entities (cursor, spawned pens, teleport-controls)

reduce how often sharedBuffer.update() is called to improve performance, especially when first loading into a room that has existing drawings.

fix bug that occur because clients were assuming mutual dataChannel connections when that is not always true (client B can't assume it can message client A even if it has received a message from client A already)

limit length of individual lines; limit how many lines can persist before line deletion kicks in; use both a min and max timeout for line deletion

fixed faceculling order on geometry for lines and caps, both even and odd segments. Added timed delete per line. Fixed networking bug where line data could be sent before remote clients were fully initialized. Adding drawing manager that prevents multiple pens from drawing on the same drawing at the same time.