Add documentation and utility modules

- Add API specification documentation
- Add system specification document
- Add UI mockups and documentation
- Add utility modules (wifi)

docs/mockups/README.md

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+# UI Mockups
+
+This directory contains HTML mockups and generated images for the LED Driver user interface.
+
+## Files
+
+### HTML Mockups
+- **index.html** - Navigation page linking to all mockups
+- **dashboard.html** - Main control panel for managing LED patterns and devices
+- **pattern-selector.html** - Visual pattern selection interface
+- **device-management.html** - Device and group management interface
+- **settings.html** - Comprehensive settings configuration panel
+
+### Generated Images
+Images are automatically generated in the `images/` directory:
+- `dashboard.png`
+- `pattern-selector.png`
+- `device-management.png`
+- `settings.png`
+- `index.png`
+
+## Generating Images
+
+To generate images from the HTML files, use the provided script:
+
+```bash
+# Install dependencies (if not already installed)
+pipenv install playwright
+pipenv run playwright install chromium
+
+# Generate images
+pipenv run python generate_images.py
+```
+
+The script will:
+1. Check for available screenshot libraries (Playwright, Selenium, or html2image)
+2. Generate PNG images from all HTML files
+3. Save images to the `images/` directory
+
+### Requirements
+
+The script supports multiple screenshot libraries (in order of preference):
+1. **Playwright** (recommended) - `pip install playwright && playwright install chromium`
+2. **Selenium** - `pip install selenium` (requires ChromeDriver)
+3. **html2image** - `pip install html2image`
+
+## Viewing Mockups
+
+Simply open any HTML file in a web browser to view the mockup. Start with `index.html` for navigation to all mockups.
+
+## Notes
+
+- All mockups are responsive and work on desktop and mobile devices
+- The mockups use modern CSS with gradients and smooth animations
+- Interactive elements (buttons, sliders, etc.) are functional in the HTML but are mockups (no backend connection)
+