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/Singularity/EntitySystems/EmitterSystem.cs

@@ -11,6 +11,7 @@ using Content.Shared.Examine;
 using Content.Shared.Interaction;
 using Content.Shared.Lock;
 using Content.Shared.Popups;
+using Content.Shared.Power;
 using Content.Shared.Projectiles;
 using Content.Shared.Singularity.Components;
 using Content.Shared.Singularity.EntitySystems;