[FEAT]: local caching of chat history to minimize API calls

[ChandruWritesCode]

Details

to use secure storage systems to cache the chat history locally on device so that we can minimize the amount of API calls

[mrsumanbiswas]

One Note: ensure to use ws wherever possible instead direct api..

[mrsumanbiswas]

well, let push it v0.3.0; so changing the milestone accordingly