[AvatarScaleMod] Mod Network attempt 2.

I lost the first attempt when switching branches.
Lot of this still needs to be redone, as it is just quickly slapped together atm.

AvatarScale/AvatarScaling/AvatarScaleManager.cs

@@ -0,0 +1,112 @@
+using ABI_RC.Core.Player;
+using NAK.AvatarScaleMod.Networking;
+using UnityEngine;
+
+namespace NAK.AvatarScaleMod.AvatarScaling;
+
+public class AvatarScaleManager : MonoBehaviour
+{
+    public static AvatarScaleManager Instance;
+
+    private Dictionary<string, UniversalAvatarScaler> _networkedScalers;
+    private UniversalAvatarScaler _localAvatarScaler;
+    
+    #region Unity Methods
+
+    private void Awake()
+    {
+        if (Instance != null)
+        {
+            DestroyImmediate(this);
+            return;
+        }
+
+        Instance = this;
+        _networkedScalers = new Dictionary<string, UniversalAvatarScaler>();
+    }
+
+    #endregion
+
+    #region Local Methods
+
+    public void OnAvatarInstantiated(PlayerSetup playerSetup)
+    {
+        if (playerSetup._avatar == null)
+            return;
+        
+        if (_localAvatarScaler != null)
+            Destroy(_localAvatarScaler);
+
+        _localAvatarScaler = playerSetup._avatar.AddComponent<UniversalAvatarScaler>();
+        _localAvatarScaler.Initialize(playerSetup._initialAvatarHeight, playerSetup.initialScale);
+    }
+
+    public void OnAvatarDestroyed()
+    {
+        if (_localAvatarScaler != null)
+            Destroy(_localAvatarScaler);
+    }
+
+    public void SetHeight(float targetHeight)
+    {
+        if (_localAvatarScaler == null) 
+            return;
+        
+        _localAvatarScaler.SetHeight(targetHeight);
+        ModNetwork.SendNetworkHeight(targetHeight);
+        
+        // immediately update play space scale
+        PlayerSetup.Instance.CheckUpdateAvatarScaleToPlaySpaceRelation();
+    }
+
+    public void ResetHeight()
+    {
+        if (_localAvatarScaler != null)
+            _localAvatarScaler.ResetHeight();
+    }
+    
+    public float GetHeight()
+    {
+        return (_localAvatarScaler != null) ? _localAvatarScaler.GetHeight() : -1f;
+    }
+
+    #endregion
+
+    #region Network Methods
+
+    public void OnNetworkAvatarInstantiated(PuppetMaster puppetMaster)
+    {
+        if (puppetMaster.avatarObject == null)
+            return; 
+        
+        string playerId = puppetMaster._playerDescriptor.ownerId;
+        
+        if (_networkedScalers.ContainsKey(playerId))
+            _networkedScalers.Remove(playerId);
+
+        UniversalAvatarScaler scaler = puppetMaster.avatarObject.AddComponent<UniversalAvatarScaler>();
+        scaler.Initialize(puppetMaster._initialAvatarHeight, puppetMaster.initialAvatarScale);
+        _networkedScalers[playerId] = scaler;
+    }
+
+    public void OnNetworkAvatarDestroyed(string playerId)
+    {
+        if (_networkedScalers.ContainsKey(playerId))
+            _networkedScalers.Remove(playerId);
+    }
+
+    public void OnNetworkHeightUpdateReceived(string playerId, float targetHeight)
+    {
+        if (_networkedScalers.TryGetValue(playerId, out UniversalAvatarScaler scaler))
+            scaler.SetHeight(targetHeight);
+    }
+    
+    public float GetNetworkHeight(string playerId)
+    {
+        if (_networkedScalers.TryGetValue(playerId, out UniversalAvatarScaler scaler))
+            return scaler.GetHeight();
+        return -1f;
+    }
+    
+    #endregion
+}