Add Portuguese (Brazil) localization for VSCode extension UI labels

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

Summary

The Claude Code VSCode extension shows permission prompts and UI labels
in English regardless of the VSCode display language setting.

Current behavior

With VSCode set to português (Brasil) as the display language, the
extension still shows:

• "Do you want to proceed with PowerShell?"
• "Yes" / "No" / "Tell Claude what to do instead"
• "Esc to cancel"
• Tool action labels: "Edit", "Modified", "Bash", etc.

Expected behavior

These strings should be localized (or at minimum follow the VSCode
display language). PT-BR support would be a great start.

Environment

• VSCode display language: português (Brasil)
• OS: Windows 11

Proposed Solution

Gostaria que tivesse algum lugar para escolher o idioma da extenção no vscode

Alternative Solutions

_No response_

Priority

Critical - Blocking my work

Feature Category

CLI commands and flags

Use Case Example

_No response_

Additional Context

_No response_