Initial commit: NixOS flake with Cursor 1.3.9

- Complete NixOS configuration with Cursor AppImage
- Development environment with Node.js, Python, Rust
- Modern shell setup with Zsh and Starship
- AppImage support and desktop integration
- Comprehensive documentation and quick start guide

QUICKSTART.md

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+# Quick Start Guide
+
+Get Cursor 1.3.9 running on NixOS in minutes!
+
+## Prerequisites
+
+- NixOS system with flakes enabled
+- Git installed
+
+## Quick Setup
+
+1. **Clone and enter the repository:**
+   ```bash
+   git clone <your-repo-url>
+   cd cursor-flake
+   ```
+
+2. **Customize the username** (optional):
+   - Edit `home.nix` and change `home.username = "liam";` to your username
+   - Edit `configuration.nix` and change `users.users.liam` to your username
+
+3. **Deploy to your system:**
+   ```bash
+   sudo nixos-rebuild switch --flake .#cursor-system
+   ```
+
+4. **Launch Cursor:**
+   - From applications menu: Look for "Cursor"
+   - From terminal: Run `cursor`
+
+## What You Get
+
+- ✅ **Cursor 1.3.9**: Latest AI-first code editor
+- ✅ **Development Environment**: Node.js, Python, Rust, Git
+- ✅ **Modern Shell**: Zsh with Starship prompt
+- ✅ **CLI Tools**: ripgrep, fd, bat, eza, fzf, tmux
+- ✅ **Desktop Integration**: GNOME with proper launcher
+
+## Testing
+
+To test before deploying:
+```bash
+# Build the system (takes a few minutes)
+nix build .#nixosConfigurations.cursor-system.config.system.build.vm
+
+# Run in VM (optional)
+./result/bin/run-cursor-system-vm
+```
+
+## Troubleshooting
+
+- **Cursor won't start**: Make sure you have FUSE support enabled
+- **Permission issues**: Check that your user is in the correct groups
+- **Build fails**: Run `nix flake check` to validate the configuration
+
+## Next Steps
+
+- Customize your development environment in `home.nix`
+- Add your own packages to the configuration
+- Check the full README.md for detailed documentation