Brazilian Portuguese Translation

Add Brazilian Portuguese Translation Guide Documentation

This issue tracks the addition of documentation for Brazilian Portuguese contributors who want to translate Rust by Example using the mdbook-i18n-helpers workflow.

Related PR:

• Add Portuguese (Brazil) translation files#2014
  

Summary

The proposed documentation introduces a complete translation workflow guide for Brazilian Portuguese contributors, including:

• Installation and setup of required translation tools
• Commands for creating and updating translation files
• Instructions for managing translation resources
• Guidance for compiling the translated book locally
• Translation progress tracking recommendations

Integration Details

The guide also documents how to properly register new language translations across the project configuration, including updates to:

• .github/workflows/rbe.yml
• theme/head.hbs
• src/bootstrap/src/core/build_steps/doc.rs

Motivation

Currently, there is limited onboarding documentation for contributors interested in translating Rust by Example into Brazilian Portuguese. This guide helps standardize the workflow and lowers the barrier for new translators contributing to the project.

Review related PR #2014 first, then inspect .github/workflows/rbe.yml, theme/head.hbs, and src/bootstrap/src/core/build_steps/doc.rs for existing translation registration. The documentation is done when it covers tool setup, translation-file commands, resource management, local book compilation, progress tracking, and the required registration steps for Brazilian Portuguese contributors.