Add text validation

[urielbattanoli]

[CristianDRM]

@urielbattanoli Could you explain this issue with more details?

[urielbattanoli]

@CristianDRM Some of our formatters could perform a validation. CPF, for instance, could return a value informing its wrong

[urielbattanoli]

@CristianDRM length validation, character validation, etc.