Add admin API route for managing user's badges (#23106)

Fix #22785

---------

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>

models/migrations/v1_22/v287.go

@@ -0,0 +1,46 @@
+// Copyright 2023 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package v1_22 //nolint
+
+import (
+	"xorm.io/xorm"
+)
+
+type BadgeUnique struct {
+	ID   int64  `xorm:"pk autoincr"`
+	Slug string `xorm:"UNIQUE"`
+}
+
+func (BadgeUnique) TableName() string {
+	return "badge"
+}
+
+func UseSlugInsteadOfIDForBadges(x *xorm.Engine) error {
+	type Badge struct {
+		Slug string
+	}
+
+	err := x.Sync(new(Badge))
+	if err != nil {
+		return err
+	}
+
+	sess := x.NewSession()
+	defer sess.Close()
+	if err := sess.Begin(); err != nil {
+		return err
+	}
+
+	_, err = sess.Exec("UPDATE `badge` SET `slug` = `id` Where `slug` IS NULL")
+	if err != nil {
+		return err
+	}
+
+	err = sess.Sync(new(BadgeUnique))
+	if err != nil {
+		return err
+	}
+
+	return sess.Commit()
+}