feat: add power from ipmi-dcmi command

[Rezoran]

Hi there,
I added functionality to read the Current Power on a Supermicro X10 Mainboard with connected PM-Bus PSU via ipmi-dcmi --get-system-power-statistics.
Works for my unRAID server and should not interfere with any other installation. I also tested ignoring and faulty responses.
If there are any critics, please let me know, I will do my best to fix them.
Sample output from my Server:

# ipmi-dcmi --get-system-power-statistics --interpret-oem-data
Current Power                        : 85 Watts
Minimum Power over sampling duration : 68 watts
Maximum Power over sampling duration : 217 watts
Average Power over sampling duration : 106 watts
Time Stamp                           : 02/25/2025 - 17:47:15
Statistics reporting time period     : 69873000 milliseconds
Power Measurement                    : Active