Ore veins (#14011)

* Ore veins

I dislike rocks just providing generic drops and this factors into mining more.

* fixes

* descriptions

* comment

* every flipping time

Content.Shared/IconSmoothing/SmoothEdgeComponent.cs

@@ -0,0 +1,12 @@
+using Robust.Shared.GameStates;
+
+namespace Content.Shared.IconSmoothing;
+
+/// <summary>
+/// Applies an edge sprite to <see cref="IconSmoothComponent"/> for non-smoothed directions.
+/// </summary>
+[RegisterComponent, NetworkedComponent]
+public sealed class SmoothEdgeComponent : Component
+{
+
+}