FIX - complete LB custom app compatibility (#11)

* FIX - preserve LB custom app lifecycle

* FIX - reset LB export aliases before startup

* FIX - report competing custom app providers

* FIX - identify LB app frames as live NUI

* FIX - complete LB custom app compatibility

* FIX - provide LB PicChat runtime exports

* FIX - route LB PicChat through Sky Phone

* FIX - return cached LB equipped phone number

* FIX - harden PicChat compatibility migration

* ENH - complete modular phone provider and Creator APIs

* DOC - document the Sky Phone Creator API

---------

Co-authored-by: DerEchteAlec <bycraky@gmail.com>
Co-authored-by: DerEchteAlec <alec.schitzkat@luwan.io>

sky_phone/source/client/location.lua

@@ -0,0 +1,34 @@
+local function player_coordinates()
+    local coords = GetEntityCoords(PlayerPedId())
+    return {
+        x = coords.x,
+        y = coords.y,
+        z = coords.z,
+    }
+end
+
+RegisterNUICallback("map:getPlayerCoords", function(data, cb)
+    if type(data) ~= "table" then
+        cb({ success = false, error = "invalid_request" })
+        return
+    end
+
+    cb({ success = true, data = { coords = player_coordinates() } })
+end)
+
+RegisterNUICallback("map:setWaypoint", function(data, cb)
+    local coords = type(data) == "table" and data.coords or nil
+    local x = type(coords) == "table" and tonumber(coords.x) or nil
+    local y = type(coords) == "table" and tonumber(coords.y) or nil
+    if not x or not y or x ~= x or y ~= y or math.abs(x) > 10000.0 or math.abs(y) > 10000.0 then
+        cb({ success = false, error = "invalid_marker" })
+        return
+    end
+
+    SetNewWaypoint(x, y)
+    cb({ success = true })
+end)
+
+RegisterNUICallback("skyride:get-player-coords", function(_, cb)
+    cb({ success = true, data = { coords = player_coordinates() } })
+end)