Implement package `cpf-val`

[juliolmuller]

Class-based package to validate CPF.

@coderabitai, elaborate the description for this task.

[juliolmuller]

@coderabbitai, elaborate the description for this task.

[coderabbitai]

Rate Limit Exceeded

@juliolmuller have exceeded the limit for the number of chat messages per hour. Please wait 0 minutes and 52 seconds before sending another message.