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/Radio/EntitySystems/RadioDeviceSystem.cs

@@ -9,6 +9,7 @@ using Content.Server.Speech;
 using Content.Server.Speech.Components;
 using Content.Shared.Examine;
 using Content.Shared.Interaction;
+using Content.Shared.Power;
 using Content.Shared.Radio;
 using Content.Shared.Radio.Components;
 using Robust.Shared.Prototypes;