feat: mos add load sdk for user

Author: fridayL

src/memos/mem_os/core.py

@@ -960,6 +960,30 @@ def dump(
         self.mem_cubes[mem_cube_id].dump(dump_dir)
         logger.info(f"MemCube {mem_cube_id} dumped to {dump_dir}")
 
+    def load(
+        self,
+        load_dir: str,
+        user_id: str | None = None,
+        mem_cube_id: str | None = None,
+        memory_types: list[Literal["text_mem", "act_mem", "para_mem"]] | None = None,
+    ) -> None:
+        """Dump the MemCube to a dictionary.
+        Args:
+            load_dir (str): The directory to load the MemCube from.
+            user_id (str, optional): The identifier of the user to load the MemCube from.
+                If None, the default user is used.
+            mem_cube_id (str, optional): The identifier of the MemCube to load.
+                If None, the default MemCube for the user is used.
+        """
+        target_user_id = user_id if user_id is not None else self.user_id
+        accessible_cubes = self.user_manager.get_user_cubes(target_user_id)
+        if not mem_cube_id:
+            mem_cube_id = accessible_cubes[0].cube_id
+        if mem_cube_id not in self.mem_cubes:
+            raise ValueError(f"MemCube with ID {mem_cube_id} does not exist. please regiester")
+        self.mem_cubes[mem_cube_id].load(load_dir, memory_types=memory_types)
+        logger.info(f"MemCube {mem_cube_id} loaded from {load_dir}")
+
     def get_user_info(self) -> dict[str, Any]:
         """Get current user information including accessible cubes.