feat(traffic): implement autonomous City Traffic Engine and Living Urban Crowd Engine from CBT dump

Ananta.Server/Ananta.Gameplay/Crowd/IUrbanCrowdDriver.cs

@@ -0,0 +1,11 @@
+using Ananta.SDK.Network;
+
+namespace Ananta.Server.Gameplay.Crowd;
+
+public interface IUrbanCrowdDriver
+{
+    Task<(bool Ok, ulong[] EntityIds)> SpawnCrowdPedestriansAsync(
+        TcpSession session, uint npcFormworkId, uint poiActionId, float x, float y, float z, float facing);
+
+    (bool HasPlayer, float X, float Y, float Z, float Yaw, uint RaidId) GetPlayerPosition(TcpSession session);
+}