[FEATURE] RedisChatMemoryStore supports native set and get commands

[Xy-hub]

Is your feature request related to a problem? Please describe.

No

Describe the solution you'd like

Users can switch the implementation method of reading and writing data

Describe alternatives you've considered

I hope the implementation method in RedisChatMemoryStore can be made configurable, because based on my personal experience, the low-version native Redis does not integrate the RedisJson plugin, and I need to install this plugin separately, which adds some difficulty to my use of RedisChatMemoryStore. Therefore, I hope to add a new configuration option that uses the RedisJson commands by default, but also allows setting up to use the native String set and get commands for read and write operations.
Like this:
langchain4j:
open-ai:
redis-chat-memory:
method: json or string

Thank you

Additional context

No

[Martin7-1]

@Xy-hub Good point I think! Would you like to contribute to it?

[Xy-hub]

@Martin7-1 OK, I will try it.