Create readme_ptBR

[BrunoSFreschi]

Hello maintainers,

This Pull Request adds a Portuguese (Brazil) translation of the README. The goal is to make the document more accessible to Brazilian users who are not fluent in English. By providing this version, I hope to contribute to social inclusion, ensuring that more people in our country can understand and engage with the project.

I kindly request your review and approval of this PR so that the translation can benefit the community.

Thank you for the opportunity to contribute.