Initial commit: Invoice field extraction system using YOLO + OCR

Features:
- Auto-labeling pipeline: CSV values -> PDF search -> YOLO annotations
- Flexible date matching: year-month match, nearby date tolerance
- PDF text extraction with PyMuPDF
- OCR support for scanned documents (PaddleOCR)
- YOLO training and inference pipeline
- 7 field types: InvoiceNumber, InvoiceDate, InvoiceDueDate, OCR, Bankgiro, Plusgiro, Amount

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

pyproject.toml

@@ -0,0 +1,78 @@
+[build-system]
+requires = ["setuptools>=68.0", "wheel"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "invoice-master"
+version = "2.0.0"
+description = "Automatic invoice information extraction using YOLO + OCR"
+readme = "README.md"
+requires-python = ">=3.10"
+license = {text = "MIT"}
+authors = [
+    {name = "Invoice Master Team"}
+]
+keywords = ["invoice", "ocr", "yolo", "document-processing", "pdf"]
+classifiers = [
+    "Development Status :: 4 - Beta",
+    "Intended Audience :: Developers",
+    "License :: OSI Approved :: MIT License",
+    "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
+]
+
+dependencies = [
+    "PyMuPDF>=1.23.0",
+    "paddlepaddle>=2.5.0",
+    "paddleocr>=2.7.0",
+    "ultralytics>=8.1.0",
+    "Pillow>=10.0.0",
+    "numpy>=1.24.0",
+    "opencv-python>=4.8.0",
+    "pyyaml>=6.0",
+    "tqdm>=4.65.0",
+]
+
+[project.optional-dependencies]
+dev = [
+    "pytest>=7.0.0",
+    "pytest-cov>=4.0.0",
+    "black>=23.0.0",
+    "ruff>=0.1.0",
+    "mypy>=1.0.0",
+]
+gpu = [
+    "paddlepaddle-gpu>=2.5.0",
+]
+
+[project.scripts]
+invoice-autolabel = "src.cli.autolabel:main"
+invoice-train = "src.cli.train:main"
+invoice-infer = "src.cli.infer:main"
+
+[tool.setuptools.packages.find]
+where = ["."]
+include = ["src*"]
+
+[tool.black]
+line-length = 100
+target-version = ["py310", "py311", "py312"]
+
+[tool.ruff]
+line-length = 100
+target-version = "py310"
+select = ["E", "F", "W", "I", "N", "D", "UP", "B", "C4", "SIM"]
+ignore = ["D100", "D104"]
+
+[tool.mypy]
+python_version = "3.10"
+warn_return_any = true
+warn_unused_ignores = true
+disallow_untyped_defs = true
+
+[tool.pytest.ini_options]
+testpaths = ["tests"]
+python_files = ["test_*.py"]
+addopts = "-v --cov=src --cov-report=term-missing"