Load local personas from personas subdirectory of .jupyter directory

Author: andrii-i

packages/jupyter-ai/jupyter_ai/personas/persona_manager.py

@@ -209,8 +209,15 @@ def _init_local_persona_classes(self) -> None:
         dotjupyter_dir = self.get_dotjupyter_dir()
         if dotjupyter_dir is None:
             self.log.info("No .jupyter directory found for loading local personas.")
-        else:
-            self._local_persona_classes = load_from_dir(dotjupyter_dir, self.log)
+            return
+
+        personas_subdir = os.path.join(dotjupyter_dir, "personas")
+        if not os.path.exists(personas_subdir):
+            self.log.info(
+                "No 'personas' subdirectory found in .jupyter directory for loading local personas."
+            )
+
+        self._local_persona_classes = load_from_dir(personas_subdir, self.log)
 
     def _init_personas(self) -> dict[str, BasePersona]:
         """