fix: 修改多个处理函数的返回类型为指针类型，以提高内存使用效率并避免不必要的拷贝

model/handler.go

@@ -2,8 +2,8 @@ package model
 
 import "git.lxtend.com/qqbot/constants"
 
-type Handler func(msg Message) (reply Reply)
-type TryCatchHandler func(msg Message) (reply Reply, catched bool)
+type Handler func(msg Message) (reply *Reply)
+type TryCatchHandler func(msg Message) (reply *Reply, catched bool)
 
 type HandlerInfo[H Handler | TryCatchHandler] struct {
 	Trigger string

model/message.go

@@ -15,13 +15,7 @@ type GroupInfo struct {
 }
 
 type Reply struct {
-	ReplyMsg       string  `json:"replyMsg"`
-	ReferOriginMsg bool    `json:"referOriginMsg"`
-	FromMsg        Message `json:"fromMsg"`
-}
-
-var NotReply = Reply{
-	ReplyMsg:       "",
-	ReferOriginMsg: false,
-	FromMsg:        Message{},
+	ReplyMsg       interface{} `json:"replyMsg"`
+	ReferOriginMsg bool        `json:"referOriginMsg"`
+	FromMsg        Message     `json:"fromMsg"`
 }

model/upstream_message.go

@@ -14,13 +14,13 @@ type SendPkg struct {
 
 // 上游包的参数结构体
 type UpstreamParams struct {
-	UserID     int64  `json:"user_id"`
-	GroupID    int64  `json:"group_id"`
-	Message    string `json:"message"`
-	AutoEscape bool   `json:"auto_escape"`
+	UserID     int64       `json:"user_id"`
+	GroupID    int64       `json:"group_id"`
+	Message    interface{} `json:"message"`
+	AutoEscape bool        `json:"auto_escape"`
 }
 
-func GenSendPkg(userID int64, groupID int64, message string, autoEscape bool) SendPkg {
+func GenSendPkg(userID int64, groupID int64, message interface{}, autoEscape bool) SendPkg {
 	if groupID == 0 {
 		return SendPkg{
 			Action: constants.PRIVATE_MSG_SEND,