Explore memory issues

[1ForeverHD]

• [x] Consider sharing a checker part between all zones.
  • [x] Explore whether a zone check can be performed in 2 locations at the same time
  • [x] Then either do ZoneController or Zone getCheckerPart
• [x] Also, why does checkerpart still work outside of worksapce?
• [x] Move checkerPart to ReplicatedStorage/worldModel
• [x] Tracker
  • [x] Fix leak
  • [x] Consider only listening and updating changes instead of everything
  • [x] Consider only constructing a tracker (such as player) only when needed
• [x] Consider a specific item entered and item exited signal / promise
  • [x] Explore if Signals are CGd if no reference of them remains, otherwise use Promise
  • [x] zone:onItemEnter(characterOrBasePart, callbackFunc)
  • [x] zone:onItemExit(characterOrBasePart, callbackFunc)
  • [x] Technicals
  • [x] If first callback item in dictionary, Determine if item is already being tracked, note this down,
  • [x] Record callback functions in dictionary with the item as the key (allow multiple callbacks)
  • [x] Form a connection with the zone (zone.itemEntered/Exited) which listens for these changes. Only form 1 connection per zone.
  • [x] When item exits/enters, check for callback stuff, then call these if present
  • [x] If the item was originally untracked, call zone:untrackItem
  • [x] Add example to docs and thread
• [x] Explore: https://devforum.roblox.com/t/zoneplus-v310-construct-dynamic-zones-and-effectively-determine-players-and-parts-within-their-boundaries/1017701/270?u=foreverhd