feat(imports/points): distance checks and interaction api

WIP. Set callback functions when exiting and standing in range of
a set point. Primary callback is called on-frame and can be used
to check for key presses, distance, draw markers, etc.

imports/points/client.lua

@@ -0,0 +1,54 @@
+local points = {}
+local nearby = {}
+
+function points.new(coords, distance, data)
+	local id = #points + 1
+
+	local self = {
+		id = id,
+		coords = coords,
+		distance = distance
+	}
+
+	for k, v in pairs(data) do
+		self[k] = v
+	end
+
+	points[id] = self
+
+	return self
+end
+
+CreateThread(function()
+	while true do
+		local coords = GetEntityCoords(cache.ped)
+		Wait(300)
+		table.wipe(nearby)
+
+		for i = 1, #points do
+			local point = points[i]
+			local distance = #(coords - point.coords)
+
+			if distance <= point.distance then
+				nearby[#nearby + 1] = point
+				point.currentDistance = distance
+			elseif point.currentDistance then
+				if point.onExit then point:onExit() end
+				point.entered = nil
+				point.currentDistance = nil
+			end
+		end
+	end
+end)
+
+CreateThread(function()
+	while true do
+		Wait(0)
+		for i = 1, #nearby do
+			local point = nearby[i]
+			if point.callback then point:callback() end
+		end
+	end
+end)
+
+return points