ECS AsteroidRock and add a doafter to mining (#6120)

Co-authored-by: metalgearsloth <comedian_vs_clown@hotmail.com>

Content.Server/Mining/Components/MineableComponent.cs

@@ -0,0 +1,11 @@
+using Robust.Shared.Analyzers;
+using Robust.Shared.GameObjects;
+
+namespace Content.Server.Mining.Components;
+
+[RegisterComponent, ComponentProtoName("Mineable")]
+[Friend(typeof(MineableSystem))]
+public class MineableComponent : Component
+{
+    public float BaseMineTime = 1.0f;
+}