Add documentation site with Zensical framework

Create comprehensive documentation site for adaptive-lighting.nijho.lt:

- Add zensical.toml configuration with Material theme (amber/orange)
- Create docs_gen.py module for extracting README sections via markers
- Add section markers to README.md for content reuse
- Create documentation pages:
  - index.md: Home with features overview
  - getting-started.md: Installation and quick setup
  - configuration.md: Auto-generated config options table
  - services.md: Auto-generated service documentation
  - automation-examples.md: Real-world automation recipes
  - troubleshooting.md: Common issues and solutions
  - see-also.md: External resources and links
  - advanced/brightness-modes.md: Brightness mode deep dive
  - advanced/manual-control.md: Manual control system docs
  - advanced/sleep-mode.md: Sleep mode configuration
- Add GitHub Actions workflow for building and deploying to Pages
- Add custom CSS with sun-themed styling
- Add CNAME for custom domain

Uses markdown-code-runner to auto-generate content from code schemas
and extract README sections for single-source documentation.

docs/getting-started.md

@@ -0,0 +1,117 @@
+---
+icon: lucide/rocket
+---
+
+# Getting Started
+
+This guide will help you install and configure Adaptive Lighting for the first time.
+
+## Prerequisites
+
+- [Home Assistant](https://www.home-assistant.io/) 2024.12.0 or newer
+- [HACS](https://hacs.xyz/) (Home Assistant Community Store) installed
+
+## Installation
+
+### Via HACS (Recommended)
+
+1. Open HACS in your Home Assistant instance
+2. Click on **Integrations**
+3. Click the **+ Explore & Download Repositories** button
+4. Search for "Adaptive Lighting"
+5. Click **Download**
+6. Restart Home Assistant
+
+Or use this button to open HACS directly:
+
+[![Open your Home Assistant instance and open the Adaptive Lighting integration inside the Home Assistant Community Store.](https://my.home-assistant.io/badges/hacs_repository.svg)](https://my.home-assistant.io/redirect/hacs_repository/?owner=basnijholt&repository=adaptive-lighting&category=integration)
+
+### Manual Installation
+
+1. Download the latest release from [GitHub](https://github.com/basnijholt/adaptive-lighting/releases)
+2. Extract the `adaptive_lighting` folder to your `config/custom_components/` directory
+3. Restart Home Assistant
+
+## Configuration
+
+### Step 1: Add to configuration.yaml
+
+Add the following to your `configuration.yaml`:
+
+```yaml
+adaptive_lighting:
+```
+
+!!! note
+    This entry is required even if you plan to configure everything through the UI.
+
+### Step 2: Restart Home Assistant
+
+Restart Home Assistant for the changes to take effect.
+
+### Step 3: Add the Integration
+
+1. Go to **Settings** → **Devices & Services**
+2. Click **+ Add Integration**
+3. Search for "Adaptive Lighting"
+4. Follow the setup wizard to select your lights
+
+### Step 4: Configure Your Lights
+
+You can configure Adaptive Lighting in two ways:
+
+=== "Via UI"
+
+    1. Go to **Settings** → **Devices & Services**
+    2. Find Adaptive Lighting and click **Configure**
+    3. Adjust settings as needed
+
+=== "Via YAML"
+
+    ```yaml
+    adaptive_lighting:
+      - name: "Living Room"
+        lights:
+          - light.living_room_ceiling
+          - light.living_room_lamp
+        min_brightness: 20
+        max_brightness: 100
+        min_color_temp: 2200
+        max_color_temp: 5500
+    ```
+
+## Basic Configuration Example
+
+Here's a simple configuration to get you started:
+
+```yaml
+adaptive_lighting:
+  - name: "Main Lights"
+    lights:
+      - light.living_room
+      - light.bedroom
+      - light.kitchen
+    transition: 30
+    min_brightness: 10
+    max_brightness: 100
+    min_color_temp: 2000
+    max_color_temp: 5500
+```
+
+## Verifying Installation
+
+After configuration, you should see new switches in Home Assistant:
+
+- `switch.adaptive_lighting_main_lights`
+- `switch.adaptive_lighting_sleep_mode_main_lights`
+- `switch.adaptive_lighting_adapt_brightness_main_lights`
+- `switch.adaptive_lighting_adapt_color_main_lights`
+
+Turn on `switch.adaptive_lighting_main_lights` to start adapting your lights!
+
+## Next Steps
+
+- [Configuration Reference](configuration.md) - Explore all available options
+- [Services](services.md) - Learn about service calls for automations
+- [Automation Examples](automation-examples.md) - See real-world automation recipes
+- [Troubleshooting](troubleshooting.md) - Common issues and solutions