Rename query sorting types and properties

This is in line with an SDK divergence decision which is logged in [1].
People were not happy with the JS naming and hence we decided to change
it to this. The intention is that this change will find its way back
into the JS SDK.

[1] https://ably.atlassian.net/wiki/spaces/CHA/pages/3307405320/SDK+Divergence+Decision+Log

Sources/AblyChat/Messages.swift

@@ -20,21 +20,21 @@ public struct SendMessageParams: Sendable {
 }
 
 public struct QueryOptions: Sendable {
-    public enum Direction: Sendable {
-        case forwards
-        case backwards
+    public enum ResultOrder: Sendable {
+        case oldestFirst
+        case newestFirst
     }
 
     public var start: Date?
     public var end: Date?
     public var limit: Int?
-    public var direction: Direction?
+    public var orderBy: ResultOrder?
 
-    public init(start: Date? = nil, end: Date? = nil, limit: Int? = nil, direction: QueryOptions.Direction? = nil) {
+    public init(start: Date? = nil, end: Date? = nil, limit: Int? = nil, orderBy: QueryOptions.ResultOrder? = nil) {
         self.start = start
         self.end = end
         self.limit = limit
-        self.direction = direction
+        self.orderBy = orderBy
     }
 }