Refs #12145 import system forms from files instead of db

extension/Classes/Core/Constants.php

extension/Classes/Core/Database/DatabaseUpdate.php

extension/Classes/Core/Form/FormAsFile.php

extension/Classes/Core/Helper/Path.php

extension/Classes/Core/Report/Report.php

extension/Classes/Core/Store/Config.php

extension/Classes/Sql/formEditor.sql

extension/Resources/Private/Form/copyForm.json

extension/Resources/Private/Form/cron.json

extension/Resources/Private/Form/form.json

extension/Resources/Private/Form/formElement.json

extension/Resources/Private/Form/formJson.json

extension/Resources/Private/Report/formEditor.qfqr