Lots of QoL changes and bugfixes found from some playtest sessions.

Bugfixes
🟢 Client can't see Loot dropped from player inventories, or drop any themselves
🟢  Audio position fixed for clients
🟢  Audio range/falloff fixed
🟢  Client's building placement preview wasn't clearing when placing last item in a stack
🟢  Tower's rotation wasn't updating correctly on Client
🟢  "Show Range" indicator for client wasn't updating to the right size
🟢 Lots of chunks weren't shown for the client
🟢  Client couldnt see XP levels for anything
🟢 Client couldnt dismantle anything
🟢 Different colored Rockys didn't seem to have differing stats
🟢Greatly improved enemy pathing through tight spaces

QoL
🟢  Put requirements for unlocking perks on the perks
🟢 Throwing things out of inventory should throw out of the pickup range
🟢  If haven't placed the core by night 1, Core Health UI shouldn't pop up
🟢 Green highlight when can craft item instead of red
🟢  When opening a chest, your inventory opens
🟢  When pressing E to close inventory again, it closes the chest
🟢  When walking far enough away from the inspected object, it close
🟢  Various art tweaks and 

Balance
🟢 Removed knockback on mobs for now, was kinda op
🟢  Ballista tower rotation speed increased
🟢  Enemy spawn rates increased during night