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/Construction/UI/FlatpackCreatorMenu.xaml.cs

@@ -1,5 +1,6 @@
 using System.Linq;
 using Content.Client.Materials;
+using Content.Client.Materials.UI;
 using Content.Client.Message;
 using Content.Client.UserInterface.Controls;
 using Content.Shared.Construction.Components;