Add toolset for Mem0 memory

[DouweM]

Description

We could support Mem0 through a new toolset with save_memory and search_memory tools, similar to these examples:

• OpenAI Agents SDK https://docs.mem0.ai/integrations/openai-agents-sdk#basic-integration-example
• LangChain Tools: https://docs.mem0.ai/integrations/langchain-tools
  • I expect these to already work with Pydantic AI via https://ai.pydantic.dev/toolsets/#langchain-tools

References

No response

[Geoff-Robin]

@DouweM Hey, Is this issue open? I'd like to work on this.

[DouweM]

@Geoff-Robin Yep, go for it!