NPC refactor (#10122)

Co-authored-by: metalgearsloth <metalgearsloth@gmail.com>

Content.Server/NPC/Components/NPCRecentlyInjectedComponent.cs

@@ -0,0 +1,14 @@
+namespace Content.Server.NPC.Components
+{
+    /// Added when a medibot injects someone
+    /// So they don't get injected again for at least a minute.
+    [RegisterComponent]
+    public sealed class NPCRecentlyInjectedComponent : Component
+    {
+        [ViewVariables(VVAccess.ReadWrite), DataField("accumulator")]
+        public float Accumulator = 0f;
+
+        [ViewVariables(VVAccess.ReadWrite), DataField("removeTime")]
+        public TimeSpan RemoveTime = TimeSpan.FromMinutes(1);
+    }
+}