Add favorability system

Update version to v1.9.0

src/main/kotlin/PluginData.kt

@@ -1,14 +1,52 @@
 package top.jie65535.mirai
 
+import kotlinx.serialization.Serializable
 import net.mamoe.mirai.console.data.AutoSavePluginData
 import net.mamoe.mirai.console.data.value
 
+/**
+ * 好感度信息数据类
+ * @param userId QQ
+ * @param value 好感度值 (-100 ~ 100)
+ * @param reasons 调整原因列表，用于溯源
+ * @param impression 对用户的印象/画像
+ */
+@Serializable
+data class FavorabilityInfo(
+    val userId: Long,
+    val value: Int = 0,
+    val reasons: List<String> = emptyList(),
+    val impression: String = ""
+) {
+    override fun toString(): String {
+        return buildString {
+            append("好感度：$value")
+            if (impression.isNotEmpty()) {
+                append("\t印象：$impression")
+            }
+            if (reasons.isNotEmpty()) {
+                appendLine("\t调整原因：")
+                reasons.forEach { reason ->
+                    appendLine("* $reason")
+                }
+            }
+        }
+    }
+}
+
 object PluginData : AutoSavePluginData("data") {
     /**
      * 联系人记忆
      */
     val contactMemory by value(mutableMapOf<Long, String>())
 
+    /**
+     * 用户好感度数据
+     * Key: 用户QQ号
+     * Value: 好感度信息
+     */
+    val userFavorability by value(mutableMapOf<Long, FavorabilityInfo>())
+
     /**
      * 添加对话记忆
      */