Add permission checkbox for duplicate item at edit mask

[zonky2]

Add permission checkbox for duplicate item at edit mask

current we have create, edit and delete

especially with FEE, it is often not desired to be allowed to duplicate records

Is it necessary to introduce a new method here? https://github.com/contao-community-alliance/dc-general/blob/61ffe2081323104b38ad951b2fbb3cb4b0f1a025/src/DataDefinition/Definition/BasicDefinitionInterface.php#L233

[zonky2]

currently not possible without BC break - you can implement this with own listener

we look at future...