Not Entirely Random Item

Added

• Mob Spawner — block that automatically spawns mobs by category; the item in the frame determines the category and Scribble Book entry
• Display Panel — info display showing the remaining cooldown of an adjacent controller (GiveController, MobSpawner, BlockSpawner, LiquidSpawner, TierRecycler, NERI Bell); shows "Ready!" in green when available
• Display Panel integrated with Scribble Book — right-clicking with the book opens the corresponding entry
• Display Panel integrated with the NERI Bell — shows time until the next ring for bonus loot
• Display Panel crafting recipe: CCC / FTP / CRC (copper ingots, item frame, clock, black stained glass pane, repeater); recipe advancement triggers on clock in inventory
• Essence items: Ancient, Decay, End, Nature, Nether, Sculk