SEPLOS V1 V2 modbus - Implementation of binary_sensor `balancing` `charging` `discharging`

Hi @syssi 

If this information is available, would it be possible to implement these 3 `binary_sensors` ?

```YAML
binary_sensor:
  - platform: seplos_bms
    seplos_bms_id: seplos_bms
    balancing:
      name: "${name} balancing"
    charging:
      name: "${name} charging"
    discharging:
      name: "${name} discharging"
```

Many thanks