Move migrations into services and base into modules/migration (#17663)

* Move migrtions into services and base into modules/migration

* Fix imports

* Fix lint

modules/migration/options.go

@@ -0,0 +1,42 @@
+// Copyright 2019 The Gitea Authors. All rights reserved.
+// Copyright 2018 Jonas Franz. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package migration
+
+import "code.gitea.io/gitea/modules/structs"
+
+// MigrateOptions defines the way a repository gets migrated
+// this is for internal usage by migrations module and func who interact with it
+type MigrateOptions struct {
+	// required: true
+	CloneAddr             string `json:"clone_addr" binding:"Required"`
+	CloneAddrEncrypted    string `json:"clone_addr_encrypted,omitempty"`
+	AuthUsername          string `json:"auth_username"`
+	AuthPassword          string `json:"-"`
+	AuthPasswordEncrypted string `json:"auth_password_encrypted,omitempty"`
+	AuthToken             string `json:"-"`
+	AuthTokenEncrypted    string `json:"auth_token_encrypted,omitempty"`
+	// required: true
+	UID int `json:"uid" binding:"Required"`
+	// required: true
+	RepoName        string `json:"repo_name" binding:"Required"`
+	Mirror          bool   `json:"mirror"`
+	LFS             bool   `json:"lfs"`
+	LFSEndpoint     string `json:"lfs_endpoint"`
+	Private         bool   `json:"private"`
+	Description     string `json:"description"`
+	OriginalURL     string
+	GitServiceType  structs.GitServiceType
+	Wiki            bool
+	Issues          bool
+	Milestones      bool
+	Labels          bool
+	Releases        bool
+	Comments        bool
+	PullRequests    bool
+	ReleaseAssets   bool
+	MigrateToRepoID int64
+	MirrorInterval  string `json:"mirror_interval"`
+}