Add feature get hourly power consumption

[sambarza]

Hi @albertogeniola ,

Thank you for MerossIot!

I needed to retrieve the hourly power consumption, so this pull request adds support for it through a new mixin.

The implementation is based on the existing async_get_daily_power_consumption method, with minimal changes to handle the specific command payload and response structure required for hourly data.

Changes

• Added a mixin for hourly consumption
• Adjusted payload handling and response parsing

Testing

• Tested on a real physical device
• Added unit tests similar for async_get_daily_power_consumption

Documentation

• Updated the daily power consumption description (added the word "daily")
• Added a new page for hourly power consumption

I can create a pull request for the other branches if needed.

Thanks
Sam

#362