(client) feat:实现热重载，实现多维度，实现武器，实现掉落物，实现状态UI，实现攻击AI (#44)

Co-authored-by: zzdxxz <2079238449@qq.com>
Co-committed-by: zzdxxz <2079238449@qq.com>

Client/Assets/Scripts/Data/BehaviorTreeDef.cs

@@ -20,11 +20,12 @@ namespace Data
             value = xmlDef.Attribute("value")?.Value;
 
             var nodes = xmlDef.Elements("Node");
-            if (!nodes.Any())
+            var xElements = nodes as XElement[] ?? nodes.ToArray();
+            if (!xElements.Any())
                 return true; // 没有子节点也是有效的
             
             List<BehaviorTreeDef> children = new();
-            foreach (var node in nodes)
+            foreach (var node in xElements)
             {
                 var childNode = new BehaviorTreeDef();
                 if (!childNode.Init(node))