Add support for External Memory (the future replacement for UserMemory) (#2510)

* fix: surfacing properly supported types by Mem0Storage

* feat: prepare Mem0Storage to accept config paramenter

We're planning to remove `memory_config` soon. This commit kindly prepare this storage to accept the config provided directly

* feat: add external memory

* fix: cleanup Mem0 warning while adding messages to the memory

* feat: support set the current crew in memory

This can be useful when a memory is initialized before the crew, but the crew might still be a very relevant attribute

* fix: allow to reset only an external_memory from crew

* test: add external memory test

* test: ensure the config takes precedence over memory_config when setting mem0

* fix: support to provide a custom storage to External Memory

* docs: add docs about external memory

* chore: add warning messages about the deprecation of UserMemory

* fix: fix typing check

---------

Co-authored-by: Lorenze Jay <63378463+lorenzejay@users.noreply.github.com>

src/crewai/memory/user/user_memory.py

@@ -1,3 +1,4 @@
+import warnings
 from typing import Any, Dict, Optional
 
 from crewai.memory.memory import Memory
@@ -12,6 +13,12 @@ class UserMemory(Memory):
     """
 
     def __init__(self, crew=None):
+        warnings.warn(
+            "UserMemory is deprecated and will be removed in a future version. "
+            "Please use ExternalMemory instead.",
+            DeprecationWarning,
+            stacklevel=2,
+        )
         try:
             from crewai.memory.storage.mem0_storage import Mem0Storage
         except ImportError:
@@ -48,6 +55,4 @@ class UserMemory(Memory):
         try:
             self.storage.reset()
         except Exception as e:
-            raise Exception(
-                f"An error occurred while resetting the user memory: {e}"
-            )
+            raise Exception(f"An error occurred while resetting the user memory: {e}")