Power stuff (#31314)

* Power stuff

- Add shared IsPowered
- Add shared ResolveApc
- Move PowerChangedEvent to shared for now
- Add SlimPoweredLight that actually functions how you'd expect a PoweredLight to function it id didn't have a bunch of bloat on it.

* big update

* boing

Content.Server/Power/EntitySystems/PowerNetSystem.cs

@@ -5,6 +5,7 @@ using Content.Server.Power.NodeGroups;
 using Content.Server.Power.Pow3r;
 using Content.Shared.CCVar;
 using Content.Shared.Power;
+using Content.Shared.Power.Components;
 using JetBrains.Annotations;
 using Robust.Server.GameObjects;
 using Robust.Shared.Configuration;