Add home automation devices API endpoint

[briadelour]

Description

This PR adds support for the SolarEdge home automation devices API endpoint, enabling retrieval of smart home device information including EV chargers, batteries, and other connected devices.

Changes

• Added async_get_home_automation_devices() method to retrieve home automation device information
• Endpoint: https://monitoring.solaredge.com/services/api/homeautomation/v1.0/sites/{site_id}/devices
• Implemented session state initialization by visiting the Smart Home page before API calls
• Added _smart_home_visited flag to track session state and avoid redundant page visits
• Includes proper error handling and logging

Implementation Details

The home automation API requires specific session state to be established before it will return device data. The implementation:

1. Logs in to obtain session cookies (existing functionality)
2. Visits the Smart Home page URL to establish proper session context
3. Calls the devices API endpoint, which now succeeds with the initialized session
4. Returns the complete device information including device types, status, features, and configuration

This approach mirrors how the SolarEdge web interface itself accesses the API.

Testing

✅ Successfully tested with my SolarEdge installation:

Test Environment:

• Site ID: xxxxxxx
• Equipment: 33 pieces of solar equipment
• Home Automation Devices: 1 EV Charger

[tronikos]

Can you fix the pre-commit findings?