Implement SparkOS MVP: init system, build infrastructure, and rootfs

Co-authored-by: johndoe6345789 <224850594+johndoe6345789@users.noreply.github.com>

CONTRIBUTING.md

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+# Contributing to SparkOS
+
+Thank you for your interest in contributing to SparkOS!
+
+## Project Goals
+
+SparkOS aims to be:
+- **Minimal**: Only essential components
+- **Clean**: Well-documented, readable code
+- **Portable**: dd-able to USB drives
+- **Extensible**: Easy to add features incrementally
+
+## Development Setup
+
+1. Clone the repository:
+   ```bash
+   git clone https://github.com/johndoe6345789/SparkOS.git
+   cd SparkOS
+   ```
+
+2. Build the system:
+   ```bash
+   ./scripts/build.sh
+   ```
+
+3. Make your changes
+
+4. Test your changes:
+   ```bash
+   make clean
+   make all
+   ```
+
+## Code Style
+
+- **C/C++ Code**: Follow Linux kernel style guidelines
+  - Use tabs for indentation
+  - Keep lines under 80 characters when reasonable
+  - Comment complex logic
+  
+- **Shell Scripts**: Follow Google Shell Style Guide
+  - Use `#!/bin/bash` shebang
+  - Quote variables
+  - Use meaningful variable names
+
+- **Documentation**: Write clear, concise documentation
+  - Update README when adding features
+  - Comment non-obvious code
+  - Include usage examples
+
+## Submitting Changes
+
+1. Fork the repository
+2. Create a feature branch (`git checkout -b feature/my-feature`)
+3. Make your changes
+4. Test thoroughly
+5. Commit with descriptive messages
+6. Push to your fork
+7. Open a Pull Request
+
+## What to Contribute
+
+Priority areas:
+- Bug fixes
+- Documentation improvements
+- Build system enhancements
+- Testing infrastructure
+- Qt6/QML GUI components
+- Wayland integration
+- Package management
+- Network configuration
+
+## Questions?
+
+Open an issue on GitHub for questions or discussions.