feat: Please add equality to FormzInput

[m8811163008]

Description

Hello,
Please add equality to FormzInput class for value and isPure to prevent unnecessary builds on flutter widgets working with bloc library or add clear documentation to pub dev

Requirements

• All CI/CD checks are passing.
• There is no drop in the test coverage percentage.

Additional Context

No response

[alestiago]

Hi @m8811163008! Thanks for opening an issue!

I've seen Formz used with Bloc successfully in the past.

Check this Bloc example that uses Formz: https://github.com/felangel/bloc/blob/master/examples/flutter_login/lib/login/bloc/login_bloc.dart.

Let me know if it helps!