[pug/pt-br] Add translation for Pug documentation (#4847)

* docs(pt-br): Add translation for Pug documentation

This commit adds the translation for the Pug documentation from English to
Brazilian Portuguese. The translated content includes an introduction to Pug,
syntax examples for tags, attributes, JavaScript usage, loops, conditionals,
including content, mixins, and additional resources. This translation aims
to make the Pug documentation more accessible to Portuguese-speaking users.
It covers the basic concepts and functionalities of Pug, providing a
comprehensive guide for developers interested in using the Pug templating
engine for HTML generation in their projects.

* docs(pt-br): Add translation for Pug documentation

Translate the last section "Additional Resources"

* docs(pug): Update comments in Portuguese translation

Update the comments to better reflect the behavior of the code.
- Changed "Tags com filhos" to "Tags aninhadas" for clarity.

* feat: Update Portuguese text in Pug guide

Update Portuguese text in the Pug guide to improve readability and
consistency with the rest of the document.
- Changed "Hello there" to "Olá, pessoas"
- Adjusted multi-line text from English to Portuguese for alignment.
- Made sure all text aligns with the same language throughout the guide.

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