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.Shared/Chemistry/Components/Solution.cs

@@ -6,6 +6,7 @@ using Robust.Shared.Serialization;
 using Robust.Shared.Utility;
 using System.Collections;
 using System.Linq;
+using Content.Shared.Chemistry.Components.SolutionManager;
 
 namespace Content.Shared.Chemistry.Components
 {