Implement content extraction job (#18022)

jobs/interfaces/extract_content_interface.go

@@ -0,0 +1,12 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package interfaces
+
+import (
+	"github.com/mattermost/mattermost-server/v6/model"
+)
+
+type ExtractContentInterface interface {
+	MakeWorker() model.Worker
+}