Split migrations folder (#21549)

There are too many files in `models/migrations` folder so that I split
them into sub folders.

models/migrations/v1_10/v99.go

@@ -0,0 +1,39 @@
+// Copyright 2019 The Gitea 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 v1_10 //nolint
+
+import (
+	"code.gitea.io/gitea/modules/timeutil"
+
+	"xorm.io/xorm"
+)
+
+func AddTaskTable(x *xorm.Engine) error {
+	// TaskType defines task type
+	type TaskType int
+
+	// TaskStatus defines task status
+	type TaskStatus int
+
+	type Task struct {
+		ID             int64
+		DoerID         int64 `xorm:"index"` // operator
+		OwnerID        int64 `xorm:"index"` // repo owner id, when creating, the repoID maybe zero
+		RepoID         int64 `xorm:"index"`
+		Type           TaskType
+		Status         TaskStatus `xorm:"index"`
+		StartTime      timeutil.TimeStamp
+		EndTime        timeutil.TimeStamp
+		PayloadContent string             `xorm:"TEXT"`
+		Errors         string             `xorm:"TEXT"` // if task failed, saved the error reason
+		Created        timeutil.TimeStamp `xorm:"created"`
+	}
+
+	type Repository struct {
+		Status int `xorm:"NOT NULL DEFAULT 0"`
+	}
+
+	return x.Sync2(new(Task), new(Repository))
+}