feat: Initial implementation of FitTrack Report Generator

This commit introduces the initial version of the FitTrack Report Generator, a FastAPI application for analyzing workout files.

Key features include:
- Parsing of FIT, TCX, and GPX workout files.
- Analysis of power, heart rate, speed, and elevation data.
- Generation of summary reports and charts.
- REST API for single and batch workout analysis.

The project structure has been set up with a `src` directory for core logic, an `api` directory for the FastAPI application, and a `tests` directory for unit, integration, and contract tests.

The development workflow is configured to use Docker and modern Python tooling.

examples/GarminSync/.dockerignore

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+# Ignore version control and IDE files
+.git
+.gitignore
+.vscode
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+# Ignore local configuration files
+.env
+.env.*
+*.env
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+# Ignore build artifacts and cache
+__pycache__
+*.pyc
+*.pyo
+*.pyd
+.pytest_cache
+.mypy_cache
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+# Ignore test files
+tests/
+tests_*.py
+
+# Ignore documentation files
+docs/
+*.md
+*.rst
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+# Allow specific patch file we need for Docker
+!patches/garth_data_weight.py
+justfile
+requirements.txt  # Replaced by pyproject.toml
+
+# Ignore temporary files
+*.swp
+*.bak
+*.tmp
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+# Ignore data directories
+data/*
+!data/README.md  # Keep README if present
+
+# Ignore migration files (handled separately)
+!migrations/alembic.ini
+!migrations/versions/*.py
+
+# Ignore local development files
+docker-compose.yml
+docker-compose.*.yml