Lake's CC Additions

New pen texture, held with a pencil-style grip in first and third person. First person now renders the player's arm gripping the pen -- correct skin and slim/wide arm variant, equip and swing animations preserved -- instead of a floating sprite. Fixed the printout viewer drawing its background gradient over the page, which made the paper see-through and ghosted the held printout through the GUI.

Printed books can now be placed in chiseled bookshelves. Fixed thick printed books z-fighting when held (page edges now keep stable depth separation, also under shaders). Fixed paging through a printout faster than the server round trip snapping back to stale pages; the viewer is now client-authoritative and draws pen ink directly.

Added the Camo Network Cable: joins CC:T wired networks like a cable and can be disguised as any full opaque block (right-click with the block, sneak-punch to strip). Uses CC:T's cable model and textures with a matching hitbox, and the disguise renders as real terrain geometry so resource packs and shader material maps apply. Fixed the disguise not appearing until a neighbouring block update.