Add comprehensive .gitignore

Excludes development artifacts while preserving HF models:
- Python cache files and virtual environments
- IDE files and OS-specific files (.DS_Store, etc.)
- Development scripts (convert_*.py, test_*.py, etc.)
- Local model directories (coreml_models/, models/, etc.)
- PyTorch model files (*.bin, *.pth, *.safetensors, etc.)
- Temporary and backup files
- Configuration files with secrets

Preserves for HuggingFace:
- .mlpackage files (CoreML models)
- tokenizer files (*.json, *.model)
- README.md and config.json
- Essential repository files

🤖 Generated with [Claude Code](https://claude.ai/code)

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

.gitignore

@@ -0,0 +1,174 @@
+# Python
+__pycache__/
+*.py[cod]
+*$py.class
+*.so
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# Virtual environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# IDEs
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# macOS
+.DS_Store
+.AppleDouble
+.LSOverride
+Icon?
+._*
+.DocumentRevisions-V100
+.fseventsd
+.Spotlight-V100
+.TemporaryItems
+.Trashes
+.VolumeIcon.icns
+.com.apple.timemachine.donotpresent
+.AppleDB
+.AppleDesktop
+Network Trash Folder
+Temporary Items
+.apdisk
+
+# Windows
+Thumbs.db
+Thumbs.db:encryptable
+ehthumbs.db
+ehthumbs_vista.db
+*.tmp
+*.temp
+*.lnk
+Desktop.ini
+$RECYCLE.BIN/
+*.cab
+*.msi
+*.msix
+*.msm
+*.msp
+*.exe
+
+# Linux
+*~
+.fuse_hidden*
+.directory
+.Trash-*
+.nfs*
+
+# Logs
+*.log
+logs/
+
+# Local development files
+*.local
+.cache/
+temp/
+tmp/
+scratch/
+
+# Model development artifacts (not for HF)
+test_*.py
+debug_*.py
+convert_*.py
+quantize_*.py
+experiment_*.py
+*.ipynb
+
+# Local model directories (not for HF)
+coreml_models/
+coreml_models_*/
+models/
+local_models/
+downloads/
+test_download/
+test_*/
+
+# PyTorch model files (not for HF)
+*.bin
+*.pth
+*.pt
+*.ckpt
+*.safetensors
+*.msgpack
+*.h5
+
+# Other model formats (not for HF) 
+*.onnx
+*.tflite
+*.pb
+
+# Temporary files
+*.bak
+*.backup
+*.orig
+*.save
+*.swp
+*.tmp
+
+# Environment files
+.env.*
+secrets.txt
+api_keys.txt
+
+# Build artifacts
+__pycache__/
+*.pyc
+*.pyo
+*.pyd
+.Python
+build/
+develop-eggs/
+dist/
+
+# Testing
+.pytest_cache/
+.coverage
+htmlcov/
+.tox/
+.nox/
+
+# Documentation build
+docs/_build/
+site/
+
+# Configuration files with secrets
+config_local.json
+settings_local.json
+
+# Temporary scripts and notebooks
+playground.py
+test.py
+debug.py
+temp.py
+scratch.py
+notebook.ipynb
+*.draft.*