Multi-RS: Put actual soc limit on dbus

[rvanzundert]

Please add a dbus path to monitor the batterylife algorithm in the Multi RS

VE_REG_MULTIC_ACTUAL_SOC_LIMIT (0xD03A) un16 0.01% read-only

Relates to: /Settings/Ess/MinimumSocLimit linked to VE_REG_MULTIC_ESS_DISCHARGE_SOC (0xD053) un16 0.1%

For inspiration, these are/were? used before:
/Settings/CGwacs/BatteryLife/MinimumSocLimit <- User setting: Minimum Discharge SOC
/Settings/CGwacs/BatteryLife/SocLimit <- Output of the BatteryLife algorithm (read only)

[rvanzundert]

Duplicate of #426