Compact UHC Run

Changes

• Extended game time from 18 minutes and 30 seconds (until deathmatch) to around 47 minutes (until border moves)
• Rework border system (1500x1500 => 200x200 => 5x5 moving)
• Added gen-chunk system (Wait for all required chunks to generate before starting the game)
• Added a new command to randomize a new map center (/function _:random-center)
• Players that join in the middle of the game will now be a spectator
• Added in-game early invincibility for 60 seconds
• Player's head now dropped when killed by the player and can be crafted into Enchanted Golden Apple
• Adjusted emerald obtaining
• Adjusted item prices in shop menu
• Added new items in shop menu
• Removed Haystack and Slowball from shop menu (Still obtainable via /function give:<item>)
• Valuable items are now glowing when dropped

and other minor changes...

Fixes

• Fixed an issue where the gliding system misrecognized players as being on the ground while they were still gliding causing players to fall instantly