This PR introduces automatic GPU detection in the Makefile.

[k-vanio]

This PR introduces automatic GPU detection in the Makefile.
During the build, the system now checks for an available GPU and automatically retrieves the Compute Capability of the first detected GPU.

🔧 Main Changes

• Added compute_cap.sh script to obtain the compute capability via nvidia-smi.

• Integrated detection into the Makefile to:

  • Display the detected compute capability.
  • Produce a fatal error if no GPU is found.

✅ Benefits

• Simplifies the build process in GPU-enabled environments.
• Prevents misconfiguration and build errors caused by manual setup.
• Improves portability across different environments (GPU / non-GPU).

[brunoaduarte]

@vanio-k favor adicionar no compute_cap.sh

*"RTX 5070"*) echo "89" ;;  # NVIDIA GeForce RTX 5070 / 5070 Ti