Feat: Add support for Redis memory

[micmancini16]

This PR adds a submodule datapizza-ai-memory-redis, a Redis-based memory to be used for persistent, long-term
applications.

Installation

# Install the core framework
pip install datapizza-ai
# Install the Redis Memory
pip install datapizza-ai-memory-redis

Usage

from datapizza.memory.redis import RedisMemory

# Initialize RedisMemory with user_id and session_id
memory = RedisMemory(user_id="unique_id_for_user", session_id="unique_id_for_chat_session")

# Can be used as other memories
agent = Agent(
    name="my_agent", client=client, tools=[], memory=memory
)

# Fetch all session messages
messages = memory.memory

# Print messages
for message in messages:
    print(message)