Add Memory Agent

src/main/kotlin/PluginData.kt

@@ -1,7 +1,11 @@
 package top.jie65535.mirai
 
 import net.mamoe.mirai.console.data.AutoSavePluginData
+import net.mamoe.mirai.console.data.value
 
 object PluginData : AutoSavePluginData("data") {
-
+    /**
+     * 联系人记忆
+     */
+    val contactMemory by value(mutableMapOf<Long, String>())
 }