Initial commit: Logo detection test framework

Add DETR+CLIP based logo detection library and test framework:
- DetectLogosDETR class for logo detection and matching
- Test script with margin-based and multi-ref matching methods
- Data preparation script for test database
- Documentation for API usage and test methodology

requirements.txt

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+certifi==2025.11.12
+charset-normalizer==3.4.4
+filelock==3.20.1
+fsspec==2025.12.0
+hf-xet==1.2.0
+huggingface-hub==0.36.0
+idna==3.11
+jinja2==3.1.6
+markupsafe==3.0.3
+mpmath==1.3.0
+networkx==3.6.1
+numpy==2.2.6
+nvidia-cublas-cu12==12.8.4.1
+nvidia-cuda-cupti-cu12==12.8.90
+nvidia-cuda-nvrtc-cu12==12.8.93
+nvidia-cuda-runtime-cu12==12.8.90
+nvidia-cudnn-cu12==9.10.2.21
+nvidia-cufft-cu12==11.3.3.83
+nvidia-cufile-cu12==1.13.1.3
+nvidia-curand-cu12==10.3.9.90
+nvidia-cusolver-cu12==11.7.3.90
+nvidia-cusparse-cu12==12.5.8.93
+nvidia-cusparselt-cu12==0.7.1
+nvidia-nccl-cu12==2.27.5
+nvidia-nvjitlink-cu12==12.8.93
+nvidia-nvshmem-cu12==3.3.20
+nvidia-nvtx-cu12==12.8.90
+opencv-python==4.12.0.88
+packaging==25.0
+pillow==12.0.0
+pyyaml==6.0.3
+regex==2025.11.3
+requests==2.32.5
+safetensors==0.7.0
+setuptools==80.9.0
+sympy==1.14.0
+tokenizers==0.22.1
+torch==2.9.1
+tqdm==4.67.1
+transformers==4.57.3
+triton==3.5.1
+typing==3.10.0.0
+typing-extensions==4.15.0
+urllib3==2.6.2