perf(client/points): apply optimisations used in zones

"SphereZones" are really just points with some extra overhead, but the module
had some overall improvements to improve performance.
Includes type definitions for sumneko.

imports/points/client.lua

@@ -1,21 +1,34 @@
+---@class CPoint
+---@field id number
+---@field coords vector3
+---@field distance number
+---@field currentDistance number
+---@field remove fun()
+---@field onEnter fun(self: CPoint)?
+---@field onExit fun(self: CPoint)?
+---@field nearby fun(self: CPoint)?
+
 local points = {}
 
 local function removePoint(self)
 	points[self.id] = nil
 end
 
-local nearby = {}
-local closest
+local nearbyPoints = {}
+local nearbyCount = 0
+local closestPoint
 local tick
 
 CreateThread(function()
 	while true do
+        if nearbyCount ~= 0 then
+			table.wipe(nearbyPoints)
+			nearbyCount = 0
+		end
+
 		local coords = GetEntityCoords(cache.ped)
 		cache.coords = coords
-
-		Wait(300)
-		closest = nil
-		table.wipe(nearby)
+        closestPoint = nil
 
 		for _, point in pairs(points) do
 			local distance = #(coords - point.coords)
@@ -24,12 +37,13 @@ CreateThread(function()
 				point.currentDistance = distance
 
                 ---@diagnostic disable-next-line: need-check-nil
-				if distance < (closest?.currentDistance or point.distance) then
-					closest = point
+				if distance < (closestPoint?.currentDistance or point.distance) then
+					closestPoint = point
 				end
 
 				if point.nearby then
-					nearby[#nearby + 1] = point
+                    nearbyCount += 1
+					nearbyPoints[nearbyCount] = point
 				end
 
 				if point.onEnter and not point.inside then
@@ -44,20 +58,23 @@ CreateThread(function()
 		end
 
 		if not tick then
-			if #nearby > 0 then
+			if nearbyCount ~= 0 then
 				tick = SetInterval(function()
-					for i = 1, #nearby do
-						nearby[i]:nearby()
+					for i = 1, nearbyCount do
+						nearbyPoints[i]:nearby()
 					end
 				end)
 			end
-		elseif #nearby == 0 then
+		elseif nearbyCount == 0 then
 			tick = ClearInterval(tick)
 		end
+
+		Wait(300)
 	end
 end)
 
 lib.points = {
+    ---@return CPoint
 	new = function(...)
 		local args = {...}
 		local id = #points + 1
@@ -91,8 +108,9 @@ lib.points = {
 		return self
 	end,
 
+    ---@return CPoint
 	closest = function()
-		return closest
+		return closestPoint
 	end
 }