重构拆分原‘记忆图谱’以适应后续扩展

- 拆分原`MemoryGraph`为 MemoryCore, CacheCore, GraphCore, PerceiveCore几个部分.
- MemoryCore中将不再包含操作逻辑, 由MemoryManager统一处理, 序列化逻辑仍交给MemoryCore。
- 更新README

src/test/java/memory/MemoryTest.java

@@ -1,60 +0,0 @@
-package memory;
-
-import work.slhaf.agent.core.memory.MemoryGraph;
-import work.slhaf.agent.core.memory.node.TopicNode;
-
-import java.time.LocalDate;
-import java.util.HashMap;
-import java.util.concurrent.ConcurrentHashMap;
-
-public class MemoryTest {
-
-//@Test
-public void test1() {
-    String basicCharacter = "";
-    MemoryGraph graph = new MemoryGraph("test");
-    HashMap<String, TopicNode> topicMap = new HashMap<>();
-
-    TopicNode root1 = new TopicNode();
-    root1.setTopicNodes(new ConcurrentHashMap<>());
-
-    TopicNode sub1 = new TopicNode();
-    sub1.setTopicNodes(new ConcurrentHashMap<>());
-
-    TopicNode sub2 = new TopicNode();
-    sub2.setTopicNodes(new ConcurrentHashMap<>());
-
-    TopicNode subsub1 = new TopicNode();
-    subsub1.setTopicNodes(new ConcurrentHashMap<>());
-
-    // 构造结构：root -> sub1 -> subsub1, root -> sub2
-    sub1.getTopicNodes().put("子子主题1", subsub1);
-    root1.getTopicNodes().put("子主题1", sub1);
-    root1.getTopicNodes().put("子主题2", sub2);
-
-    topicMap.put("根主题1", root1);
-
-    // 添加 root2
-    TopicNode root2 = new TopicNode();
-    root2.setTopicNodes(new ConcurrentHashMap<>());
-
-    TopicNode sub3 = new TopicNode();
-    sub3.setTopicNodes(new ConcurrentHashMap<>());
-
-    // 构造结构：root2 -> sub3
-    root2.getTopicNodes().put("子主题3", sub3);
-
-    topicMap.put("根主题2", root2);
-
-    // 输出
-    graph.setTopicNodes(topicMap);
-    System.out.println(graph.getTopicTree());
-}
-
-
-//    @Test
-    public void test2(){
-        System.out.println(LocalDate.now());
-    }
-
-}