Cyborg power overhaul

- Medium overhaul of cyborg power usage and charging mechanics. This mostly prevents few issues, such as AFK cyborgs running out of charge when doing nothing or AFK cyborgs in chargers using 75kW of power.
- Refer to specific commits for more information

- This technically implements what currently open PR #6364 implements. Very likely to cause conflicts if both are merged.

- Tested it, should work properly. Might still need balancing.

- Mostly fixes #6358 - It won't reduce the power load, it just evens it out and caps it at 25kW for each charger.
So, tried to add it, but there is certain problem. My code is calculating needed amount of power, to prevent using more power than we can actually use to charge the internal cell. auto_use_power() only uses idle/active power usages. Not sure how to do it.

Charge meter, on the other hand, works perfectly.