docs: add Portuguese (Brazil) README

[filipemarraa]

Summary

• add a full Portuguese (Brazil) translation as README_pt.md
• keep the same media, badges, links, and command examples; only text was translated
• add the Portuguese link to the language selector in README.md

Scope

• documentation-only change
• no code, scripts, images, or assets modified

[CLAassistant]

All committers have signed the CLA.

[pszymkowiak]

[w] wshm · Automated triage by AI

📊 Automated PR Analysis

📝 Type	docs
🟢 Risk	low

Summary

Adds a full Portuguese (Brazil) translation of the README as README_pt.md and adds a link to it in the language selector of the main README.md. Documentation-only change with no code modifications.

Review Checklist

• Tests present
• Breaking change
• Docs updated

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Analyzed automatically by wshm · This is an automated analysis, not a human review.

[Copilot]

Pull request overview

Adds a Brazilian Portuguese documentation landing page and wires it into the main README language selector.

Changes:

• Added a full pt-BR translation as README_pt.md.
• Updated README.md language selector to include Portuguese.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 4 comments.

File	Description
README.md	Adds a Portuguese (Brazil) entry to the language selector.
README_pt.md	Introduces a complete Portuguese (Brazil) translated README with the same structure/media/links as the English version.

[Copilot]

Now that README_pt.md exists, the language selector block becomes inconsistent across translations: the other translated READMEs (e.g., README_es.md/README_fr.md/README_ja.md/README_ko.md/README_zh.md) still list the same language set but do not include Portuguese. Consider updating those selectors as well so users can navigate to the new Portuguese README from any language page.

[Copilot]

The Portuguese label here ("Portugues (Brasil)") doesn’t match the label used in README_pt.md ("Português (BR)"). To keep the language selector consistent, consider standardizing the display text across all READMEs (and ideally follow the existing selector style, e.g. "Francais", "Espanol").

[Copilot]

The language selector label for Portuguese here ("Português (BR)") is inconsistent with README.md ("Portugues (Brasil)") and with the selector style used for other Latin-script languages (e.g., "Francais", "Espanol" are ASCII-only). Consider standardizing the display text to match the rest of the project.

[Copilot]

This header link text is still in English ("Website"), while the equivalent link text is translated in other localized READMEs (e.g. README_es.md uses "Sitio web", README_fr.md uses "Site web"). If the goal is a full pt-BR translation, consider translating this label too.