优化EntitySystem初始化逻辑/防止多次初始化

增加matcher和entitysystem的测试

tests/ECS/Utils/Matcher.minimal.test.ts

@@ -0,0 +1,26 @@
+import { Matcher } from '../../../src/ECS/Utils/Matcher';
+
+describe('Matcher最小测试', () => {
+    test('创建空匹配器', () => {
+        const matcher = Matcher.empty();
+        expect(matcher).toBeDefined();
+        expect(matcher.toString()).toBe('Matcher()');
+    });
+    
+    test('匹配器配置方法', () => {
+        const matcher = Matcher.empty();
+        
+        // 这些方法应该返回匹配器本身
+        expect(matcher.all()).toBe(matcher);
+        expect(matcher.exclude()).toBe(matcher);
+        expect(matcher.one()).toBe(matcher);
+    });
+    
+    test('获取匹配器配置', () => {
+        const matcher = Matcher.empty();
+        
+        expect(matcher.getAllSet()).toEqual([]);
+        expect(matcher.getExclusionSet()).toEqual([]);
+        expect(matcher.getOneSet()).toEqual([]);
+    });
+});