MM-21307 Get/Update/Delete user preferences Plugin API (#13962)

* MM-21307 Get/Update/Delete user preferences Plugin API

* MM-21307 additional test case on TestPluginAPIDeleteUserPreferences

* MM-21307 remove useless loop

* Update plugin/api.go

* Update plugin/api.go

* Update plugin/api.go

* Update plugin/api.go

* Update plugin/api.go

* Update plugin/api.go

* gofmt -s

Co-authored-by: mattermod <mattermod@users.noreply.github.com>
Co-authored-by: Jesse Hallam <jesse.hallam@gmail.com>

plugin/api.go

@@ -152,6 +152,27 @@ type API interface {
 	// Minimum server version: 5.6
 	GetUsersInTeam(teamId string, page int, perPage int) ([]*model.User, *model.AppError)
 
+	// GetPreferencesForUser gets a user's preferences.
+	//
+	// @tag User
+	// @tag Preference
+	// Minimum server version: 5.26
+	GetPreferencesForUser(userId string) ([]model.Preference, *model.AppError)
+
+	// UpdatePreferencesForUser updates a user's preferences.
+	//
+	// @tag User
+	// @tag Preference
+	// Minimum server version: 5.26
+	UpdatePreferencesForUser(userId string, preferences []model.Preference) *model.AppError
+
+	// DeletePreferencesForUser deletes a user's preferences.
+	//
+	// @tag User
+	// @tag Preference
+	// Minimum server version: 5.26
+	DeletePreferencesForUser(userId string, preferences []model.Preference) *model.AppError
+
 	// GetTeamIcon gets the team icon.
 	//
 	// @tag Team