Add support for verbose error details

[rrojan]

Normally we have errors like

[]string{
    "Required field 'Name' is not provided",
    "Age must be greater than 18"
}

However this does not support custom error messages.

Providing "resourceType" and "failed" allows us to create custom error messages, both on the frontend and backend.

[]enforcer.Failed {
    enforcer.Failed{
        ResourceType: "name",
        Failed: "required",
    },
    enforcer.Failed{
        ResourceType: "age",
        Failed: "min:18",
    },
}

Then you can create custom error messages for any language like

// utils/generateErrorMessage.js


function generateErrorMessage(resource, failed) {
    return "Appropriate error from failed"
}