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.Client/Power/EntitySystems/PowerReceiverSystem.cs

@@ -1,3 +1,4 @@
+using System.Diagnostics.CodeAnalysis;
 using Content.Client.Power.Components;
 using Content.Shared.Power.Components;
 using Content.Shared.Power.EntitySystems;
@@ -27,4 +28,16 @@ public sealed class PowerReceiverSystem : SharedPowerReceiverSystem
 
         component.Powered = state.Powered;
     }
+
+    public override bool ResolveApc(EntityUid entity, [NotNullWhen(true)] ref SharedApcPowerReceiverComponent? component)
+    {
+        if (component != null)
+            return true;
+
+        if (!TryComp(entity, out ApcPowerReceiverComponent? receiver))
+            return false;
+
+        component = receiver;
+        return true;
+    }
 }