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/Components/ApcPowerReceiverComponent.cs

@@ -59,11 +59,4 @@ namespace Content.Server.Power.Components
 
         public float PowerReceived => NetworkLoad.ReceivingPower;
     }
-
-    /// <summary>
-    /// Raised whenever an ApcPowerReceiver becomes powered / unpowered.
-    /// Does nothing on the client.
-    /// </summary>
-    [ByRefEvent]
-    public readonly record struct PowerChangedEvent(bool Powered, float ReceivingPower);
 }