dataset: Add Dapfam patent retrieval tasks

mteb/abstasks/TaskMetadata.py

@@ -21,6 +21,7 @@
 
 TASK_SUBTYPE = Literal[
     "Article retrieval",
+    "Patent retrieval",
     "Conversational retrieval",
     "Dialect pairing",
     "Dialog Systems",

mteb/tasks/Retrieval/__init__.py

@@ -55,6 +55,7 @@
 from .eng.CQADupstackUnixRetrieval import *
 from .eng.CQADupstackWebmastersRetrieval import *
 from .eng.CQADupstackWordpressRetrieval import *
+from .eng.DAPFAMPatentRetrieval import *
 from .eng.DBPediaRetrieval import *
 from .eng.FaithDialRetrieval import *
 from .eng.FeedbackQARetrieval import *