docs/update-docs

[leonardodimarchi]

This PR improves the project documentation across the main README files, API docs, and contribution guides. 📜

What changed

• Updated and clarified wording in the English and translated READMEs
• Improved consistency for examples and CLI option descriptions
• Added a Portuguese contribution guide and linked it from the Portuguese README
• Reviewed and cleaned up markdown issues for better readability

Decisions made

• Kept the English README as the main reference for i18n links (easier to maintain)
• Kept anchor tags and markdown structure stable where appropriate

This update is documentation-focused and aims to make the project easier to understand for both new users and contributors.

(I have been using this tool for a few years now. Great job, everyone)

[leonardodimarchi]

Hi @zaldih!

I'm updating the documentation, and Codacy is reporting an issue with the H1 heading at the beginning of the file:

Expected: [None]; Actual: # Como contribuir para o NPKILL 🎉

Is this rule correct? Should I remove the H1 headings from CONTRIBUTING files to comply with the current Codacy rules?

[leonardodimarchi]

Closing this PR based on the decision to keep English as the only official language for npkill v1.0, as mentioned in this comment.