Migrate pydantic to v2

[SantanaTiago]

This PR removes pydantic v1 compatibility of use import pydantic.v1 and applies need changes to pydantic v2 such as:

• dict(), parse_obj(), parse_file() methods replace with model_dump(), model_validate(), model_validate_json()
• validate_arguments decorator renamed to validate_call, root_validator to model_validator
• add dependency pydantic-settings, new repo where settings class moved such as BaseSettings and updated imports
• add custom validator for unique items