Weather service for inverters

[pferrariuy]

Create weather service that can be call from inverters services in order to retrieve weather information not available at the inverters API.

• [x] Create service definition
• [x] Implemente call to Meteoblue API as example
• [x] Adjust inverters API to use weather service data

[pferrariuy]

Requires application.property to suppor salrec.meteoblue.key.