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/Physics/Controllers/ConveyorController.cs

@@ -7,6 +7,7 @@ using Content.Shared.Destructible;
 using Content.Shared.Maps;
 using Content.Shared.Physics;
 using Content.Shared.Physics.Controllers;
+using Content.Shared.Power;
 using Robust.Shared.Physics;
 using Robust.Shared.Physics.Collision.Shapes;
 using Robust.Shared.Physics.Components;