Add support for Brazilian Portuguese (ptBR) localization)

[paulovnas]

Description

This Pull Request adds the Brazilian Portuguese (ptBR) localization file to the Addon. This allows the Addon's user interface (UI) and in-game messages to be displayed in Portuguese for users with the corresponding client locale. All strings have been translated.

Motivation and context

The motivation is to expand the Addon's reach to the significant Brazilian player base, making the Addon fully accessible and user-friendly for players using the ptBR client locale.

Testing

1. Set the WoW client locale to ptBR (Brazilian Portuguese).
2. Loaded the Addon and navigated through all features (e.g., options panel, main frames).
3. Verified that all UI strings and dynamic messages (e.g., chat prints, tooltips) from the localization file are displayed correctly in Portuguese.
4. Checked for any formatting or text overflow issues within the Addon's frames due to translation length.

Screenshots

Screenshots showing the Addon's interface displayed in Portuguese (ptBR).

Types of changes

• Localization