Implement greet inbox and outbox

- Add user_greet model and startup table sync
- Implement /greet/user and /greet/delete handlers
- Implement noticeFriendGreeting inbox and noticeUserGreetingHistory outbox
- Return peer profile and center unit info for greeting notices
- Update login topInfo friend greet counters from unread inbox messages

Signed-off-by: Sean Du <do4suki@gmail.com>

internal/schema/greet/delete.go

@@ -0,0 +1,11 @@
+package greetschema
+
+type DeleteReq struct {
+	Module       string `json:"module"`
+	Action       string `json:"action"`
+	TimeStamp    int64  `json:"timeStamp"`
+	Mgd          int    `json:"mgd"`
+	IsSendMail   bool   `json:"is_send_mail"`
+	MailNoticeID int    `json:"mail_notice_id"`
+	CommandNum   string `json:"commandNum"`
+}