Enhance json schema validation with custom validators

[Daniel-VM]

PR description

This PR enhances the JSON schema validation process (validate module) by integrating custom validators for handling complex fields and validation scenarios.

The implementation allows dynamic registration of custom validators based on configuration.

Major details

• - Added method register_custom_validators to SchemaValidation class.
• - Created a schema_utils folder to store functions for performing custom validation.
• - Introduced 'json_schema_validators' in the configuratio to store keys for invoking custom validators.
• - add Create validated.json keeping only samples that passed validation process #274

Closes #271
Closes #274

[Shettland]

Since you are working with validation module, I think a nice implementation would be to create a json file with the samples that passed the validation process, as explained in #274