Replace custom NMS with torchvision library implementation

[github-actions]

Current implementation is custom-written. Consider using official torchvision NMS:
Reference: https://github.com/pytorch/vision/blob/main/torchvision/csrc/ops/cpu/nms_kernel.cpp
Benefits:

1. Optimized CPU/CUDA implementations available
2. Better maintained and tested by PyTorch team
3. Reduces custom code maintenance burden
   Trade-off: Adds torchvision as dependency (currently only use LibTorch)

Line: 114

ReUseX/libs/reusex/src/vision/utils.cpp

Lines 111 to 121 in f6e1667

	return y;
	}
	// TODO: Replace custom NMS with torchvision library implementation
	// category=Vision estimate=4h
	// Current implementation is custom-written. Consider using official torchvision NMS:
	// Reference: https://github.com/pytorch/vision/blob/main/torchvision/csrc/ops/cpu/nms_kernel.cpp
	// Benefits:
	// 1. Optimized CPU/CUDA implementations available
	// 2. Better maintained and tested by PyTorch team
	// 3. Reduces custom code maintenance burden