Move sdk structs to modules/structs (#6905)

* move sdk structs to moduels/structs

* fix tests

* fix fmt

* fix swagger

* fix vendor

modules/structs/user_email.go

@@ -0,0 +1,25 @@
+// Copyright 2015 The Gogs Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package structs
+
+// Email an email address belonging to a user
+type Email struct {
+	// swagger:strfmt email
+	Email    string `json:"email"`
+	Verified bool   `json:"verified"`
+	Primary  bool   `json:"primary"`
+}
+
+// CreateEmailOption options when creating email addresses
+type CreateEmailOption struct {
+	// email addresses to add
+	Emails []string `json:"emails"`
+}
+
+// DeleteEmailOption options when deleting email addresses
+type DeleteEmailOption struct {
+	// email addresses to delete
+	Emails []string `json:"emails"`
+}