Normalize all Portuguese content to English across codebase

[Copilot]

This PR addresses the issue of non-English content throughout the codebase by systematically translating all Portuguese comments, error messages, and documentation to English. This improves code maintainability and accessibility for international contributors.

Changes Made

Python Scripts

• tools/gen_def.py: Translated all argparse help text, comments, and error messages from Portuguese to English
  • "Gera .def e stubs referenciando um símbolo de blob" → "Generate .def and stubs referencing a blob symbol"
  • "DLL de origem" → "Source DLL"
  • "Não foi possível encontrar a DLL de origem" → "Could not find the source DLL"

Build Configuration

• CMakeLists.txt: Updated error messages and comments
  • "Falhou calcular REFLECT_SIZE" → "Failed to calculate REFLECT_SIZE"
  • "símbolos de depuração" → "debug symbols"

Header Files

• include/plib/rl/rl_tls.h: Translated TLS-related function comments
• include/plib/rl/rl_loader.h: Translated struct member documentation
• include/plib/pe/export_utils.hpp: Updated sanity check comments

Source Files

• lib/src/rl/rl_tls.cpp: Translated TLS implementation comments
• lib/src/rl/rl_loader.cpp: Updated loader-specific comments

Key Translation Examples

- // 2) Thread: preparar/desmontar bloco TLS deste módulo para threads que usarão a DLL
+ // 2) Thread: prepare/dismantle TLS block of this module for threads that will use the DLL

- // Sanidade: confirme que o RVA cai dentro do image  
+ // Sanity check: confirm that the RVA falls within the image

- raise FileNotFoundError(f"Não foi possível encontrar a DLL de origem: {args.source_dll}")
+ raise FileNotFoundError(f"Could not find the source DLL: {args.source_dll}")

Testing

• Verified Python script functionality remains intact after translation
• Confirmed all help text is now displayed in English
• Ensured no functional changes to the codebase behavior

This change makes the codebase fully English while maintaining 100% backward compatibility and functionality.

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