docs: Revamp README to provide comprehensive project template overview and setup instructions

- Expanded project description to highlight key features and advantages.
- Added detailed setup instructions, including prerequisites and quick start guide.
- Included project structure and configuration details for dependencies, testing, and code quality.
- Enhanced sections on CI/CD, publishing, and development workflow for clarity and completeness.

Author: joscha

.markdownlint.yaml

@@ -3,5 +3,5 @@ default: true
 
 # MD013/line-length - Line length
 MD013:
-  line_length: 80
+  line_length: 120
   tables: false

README.md

@@ -1,21 +1,202 @@
-# Modern Python Project
+# Modern Python Project Template
 
 [![PyPI version](https://img.shields.io/pypi/v/modern-python-project)](https://pypi.org/project/modern-python-project/)
 
-Pydantic data model for [Notion](https://www.notion.so/).
+A comprehensive, production-ready Python project template
+that incorporates modern development practices, tools, and workflows.
+This template provides everything you need to start developing,
+testing, and deploying Python packages with confidence.
 
-Install via:
+## 🚀 Key Features & Advantages
+
+### Development Environment
+
+- **[devenv.sh](https://devenv.sh/)** - Reproducible development environments using Nix
+- **Cross-platform support** - Works on macOS and Linux with conditional package loading
+- **[direnv](https://direnv.net/docs/installation.html)** integration for automatic environment activation
+- **Python 3.12** with modern tooling
+
+### Package Management & Building
+
+- **[uv](https://github.com/astral-sh/uv)** - Ultra-fast Python package installer and resolver
+- **[hatchling](https://hatch.pypa.io/)** - Modern build backend
+- **Dynamic versioning** from Git tags using `uv-dynamic-versioning`
+- **Dependency groups** for clean separation of dev/prod dependencies
+
+### Code Quality & Testing
+
+- **[pytest](https://pytest.org/)** with async support and comprehensive plugins:
+  - Coverage reporting with HTML output
+  - Snapshot testing with [syrupy](https://github.com/tophat/syrupy)
+  - Watch mode with [pytest-watcher](https://github.com/olzhasar/pytest-watcher)
+- **[ruff](https://github.com/astral-sh/ruff)** - Lightning-fast linting and formatting
+- **Pre-commit hooks** with comprehensive checks:
+  - Code formatting (ruff-format)
+  - Import sorting
+  - TOML validation
+  - Markdown formatting
+  - Security scanning (trufflehog)
+  - Shell script checking
+  - Typo detection
+
+### CI/CD & Publishing
+
+- **GitHub Actions** workflow with:
+  - Multi-OS testing (Ubuntu + macOS)
+  - Automatic PyPI publishing on tags
+  - Trusted publishing (no API keys needed)
+  - Artifact storage
+- **Renovate** for automated dependency updates
+- **Semantic versioning** with automatic tag-based releases
+
+### Documentation & Maintenance
+
+- **Markdown linting** with customizable rules
+- **License** (MIT) included
+- **Comprehensive .gitignore** for Python projects
+- **VS Code configuration** for optimal development experience
+
+## 🛠 Setup Instructions
+
+### Prerequisites
+
+- [Nix](https://nixos.org/download.html) package manager
+- [direnv](https://direnv.net/docs/installation.html) (recommended)
+
+### Quick Start
+
+1. **Clone and setup:**
+
+   ```bash
+   git clone <your-repo-url>
+   cd modern-python-project
+   direnv allow  # If using direnv
+   # OR
+   nix develop  # If not using direnv
+   ```
+
+1. **Install dependencies:**
+
+   ```bash
+   # Dependencies are automatically installed via devenv
+   # But you can manually sync if needed:
+   uv sync --all-extras
+   ```
+
+1. **Run tests:**
+
+   ```bash
+   test-all
+   ```
+
+1. **Start developing:**
+
+   ```bash
+   # Watch mode for tests
+   test-watch
+
+   # Format code
+   format
+
+   # Build package
+   build
+   ```
+
+### Environment Setup Details
+
+The development environment provides these commands:
+
+- `build` - Build the Python package
+- `format` - Run all formatters and linters
+- `test-all` - Run the complete test suite
+- `test-snapshot-update` - Update test snapshots
+- `test-watch` - Run tests in watch mode
+- `deps-upgrade` - Upgrade all dependencies
+
+## 📁 Project Structure
 
 ```sh
-pip install modern-python-project
+modern-python-project/
+├── modern_python_project/          # Main package code
+│   ├── __init__.py
+│   ├── main.py                     # CLI entry point
+│   └── my_function.py             # Example module
+├── modern_python_project_tests/    # Test package
+│   ├── __snapshots__/             # Snapshot test files
+│   ├── test_cli.py               # CLI tests
+│   └── test_my_function.py       # Module tests
+├── devenv.nix                     # Development environment config
+├── devenv.yaml                    # devenv input configuration
+├── pyproject.toml                 # Project metadata and tool config
+├── uv.lock                        # Locked dependencies
+└── README.md                      # This file
 ```
 
-## Development
+## 🔧 Configuration
+
+### Python Dependencies
+
+Dependencies are managed in `pyproject.toml`:
+
+- **Main dependencies:** Listed under `dependencies`
+- **Development dependencies:** Listed under `dependency-groups.dev`
+
+### Testing Configuration
+
+- **Coverage:** Configured to maintain 80% minimum coverage
+- **Pytest:** Async support enabled, comprehensive reporting
+- **Snapshots:** Automatic snapshot testing for CLI and functions
+
+### Code Quality
+
+- **Ruff:** Fast linting and formatting with import sorting
+- **Pre-commit:** Comprehensive hooks for code quality
+- **Coverage:** HTML reports generated in `coverage_html/`
+
+## 🚀 Development Workflow
+
+1. **Make changes** to your code
+1. **Run tests** with `test-watch` for immediate feedback
+1. **Format code** with `format` before committing
+1. **Commit changes** - pre-commit hooks will run automatically
+1. **Push to GitHub** - CI will run tests on multiple platforms
+1. **Create release** by pushing a tag (format: `vX.X.X`)
+
+## 📦 Publishing
+
+Publishing to PyPI is fully automated:
+
+1. Create a new tag: `git tag v1.0.0`
+1. Push the tag: `git push origin v1.0.0`
+1. GitHub Actions will automatically build and publish to PyPI
+
+The project uses trusted publishing, so no API keys are required.
+
+## 🌟 Why This Template?
+
+This template embodies modern Python development best practices:
+
+- **Fast feedback loops** with watch mode testing
+- **Consistent code quality** with automated formatting and linting
+- **Reliable builds** with locked dependencies and reproducible environments
+- **Secure publishing** with trusted publishing and no stored secrets
+- **Cross-platform support** with conditional package loading
+- **Comprehensive testing** with coverage tracking and snapshot testing
+- **Automated maintenance** with dependency updates and security scanning
+
+Perfect for both solo projects and team development, this template scales
+from simple scripts to complex packages while maintaining development velocity and code quality.
+
+## 📄 License
+
+MIT License - see [LICENSE](LICENSE) file for details.
 
-This repository uses [devenv](https://devenv.sh/).
-Devenv and enabled direnv will give you the best developer experience.
+## 🤝 Contributing
 
-## Releasing
+1. Fork the repository
+1. Create a feature branch
+1. Make your changes
+1. Run the test suite
+1. Submit a pull request
 
-Create a new release [here](/joscha/modern-python-project/releases/new).
-Choose a semver-style tag (i.e. `vX.X.X`). Make sure it has the `v` prefix.
+The pre-commit hooks and CI will ensure code quality and test coverage.