Support Expiration of Keys

[ahmedash95]

We want to add support for key expiration to Pedis to automatically delete keys after a specified period of time. This will help us manage memory usage and ensure that stale data is not retained indefinitely.

Tasks:

• Add an expiration time attribute to each key-value pair in the data store.
• Implement a mechanism to check the expiration time of each data structure and delete expired keys.
• Define a mechanism to configure the expiration time for individual keys or for all keys in the data store.