Add support for Obis codes `1-0:1.4.0`, `1-0:2.4.0`, `1-0:1.6.0`, `1-0:2.6.0`, `0-0:98.1.0`

[JeromeGillard]

Add support for the following Obis codes:

• 1-0:1.4.0: Positive active demand in a current demand period (A+) [kW],
• 1-0:2.4.0: Negative active demand in a current demand period (A-) [kW],
• 1-0:1.6.0: Positive active maximum demand (A+) total [kW],
• 1-0:2.6.0: Negative active maximum demand (A-) total [kW],
• 0-0:98.1.0: Maximum demand - Active energy import of the last 13 months

Seen with Belgian peak tariff with meterType FLU5\253770234_A v50217.

[JeromeGillard]

@ruudverheijden Now ready to be merged 👋 .

[ruudverheijden]

Thanks @JeromeGillard, nice work. It's merged now