Predict InjectorSystem (#39976)

* predict injectors

* hide verbs if no options

Content.Shared/Forensics/Systems/SharedForensicsSystem.cs

@@ -15,4 +15,13 @@ public abstract class SharedForensicsSystem : EntitySystem
     /// Does nothing if it does not have the FingerprintComponent.
     /// </summary>
     public virtual void RandomizeFingerprint(Entity<FingerprintComponent?> ent) { }
+
+    /// <summary>
+    /// Transfer DNA from one entity onto the forensics of another.
+    /// </summary>
+    /// <param name="recipient">The entity receiving the DNA.</param>
+    /// <param name="donor">The entity applying its DNA.</param>
+    /// <param name="canDnaBeCleaned">If this DNA be cleaned off of the recipient. e.g. cleaning a knife vs cleaning a puddle of blood.</param>
+    public virtual void TransferDna(EntityUid recipient, EntityUid donor, bool canDnaBeCleaned = true) { }
+
 }