Implemented 1'st Enhancement Request

Implemented #1

The Battery Mode is now available as additional entity - please note, that the value is translated by default - if you want to have the original (source) value from the API (unknown|normal|hold|charge), you can activate the additional available 'Battery Mode [CODE]' Entity.

Implemented additional evcc-Site entities

• auxPower
• batteryPower
• batterySoc
• gridCurrents
• gridPower
• homePower
• pvPower
• batteryCapacity
• tarifGrid
• tarifPriceHome