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

pyproject.toml

@@ -0,0 +1,15 @@
+[project]
+name = "logo-test"
+version = "0.1.0"
+description = "Add your description here"
+readme = "README.md"
+requires-python = ">=3.12"
+dependencies = [
+    "numpy>=2.2.6",
+    "opencv-python>=4.12.0.88",
+    "pillow>=12.0.0",
+    "torch>=2.9.1",
+    "tqdm>=4.67.1",
+    "transformers>=4.57.3",
+    "typing>=3.10.0.0",
+]