Port medibot + bot spawners from nyano (#9854)

* Port medibot + bot spawners from nyano

* Make the injection thresholds constants

* Remove warning

* Check against const in system too

* resolving systems just isn't worth it

* only resolve entity manager once

* Reduceother resolves too

* fix post-merge

* woops

Content.Server/AI/Tracking/RecentlyInjectedComponent.cs

@@ -0,0 +1,12 @@
+namespace Content.Server.AI.Tracking
+{
+    /// Added when a medibot injects someone
+    /// So they don't get injected again for at least a minute.
+    [RegisterComponent]
+    public sealed class RecentlyInjectedComponent : Component
+    {
+        public float Accumulator = 0f;
+
+        public TimeSpan RemoveTime = TimeSpan.FromMinutes(1);
+    }
+}