Implement CLI app for API interaction with MFA

- Create full CLI application with authentication, sync triggering, and status checking
- Implement MFA support for secure authentication
- Add token management with secure local storage
- Create API client for backend communication
- Implement data models for User Session, Sync Job, and Authentication Token
- Add command-line interface with auth and sync commands
- Include unit and integration tests
- Follow project constitution standards for Python 3.13, type hints, and code quality
- Support multiple output formats (table, JSON, CSV)

cli/setup.py

@@ -0,0 +1,30 @@
+from setuptools import setup, find_packages
+
+with open("requirements.txt") as f:
+    requirements = f.read().splitlines()
+
+setup(
+    name="garmin-sync-cli",
+    version="0.1.0",
+    packages=find_packages(where="cli/src"),
+    package_dir={"": "cli/src"},
+    install_requires=requirements,
+    entry_points={
+        "console_scripts": [
+            "garmin-sync=src.main:cli",
+        ],
+    },
+    author="FitTrack Team",
+    author_email="team@fittrack.com",
+    description="Command-line interface for interacting with GarminSync API",
+    long_description=open("README.md").read() if open("README.md").read() else "",
+    long_description_content_type="text/markdown",
+    url="https://github.com/FitTrack/GarminSync",
+    classifiers=[
+        "Development Status :: 3 - Alpha",
+        "Intended Audience :: Developers",
+        "License :: OSI Approved :: MIT License",
+        "Programming Language :: Python :: 3.13",
+    ],
+    python_requires=">=3.13",
+)