Adding more properties to Submitter model

Adding more properties to Submitter model

fix for null values

fix for null values

fix for null values

Adding a custom date cast

using a different date format

using a different date format

Changing the type for Datetime

Fixing date mapping with specific format

Moving the mapping library to Spatie laravel-data

Fixing GetSubmission error

fixing missing implementation for GetSubmission class

Adding DTO to get Submission object

Submitter class type validations, psr12 linting