Implement package `cnpj-utilities`

[juliolmuller]

Class-based package to format, generate and validate CNPJ (compatible to alphanumeric CNPJ).

@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 1 minutes and 12 seconds before sending another message.