[GGF] Voice Banking

[sethu]

User can use the voice instruction to perform bank task. Eg.
"how much did i spend on food last week?"
"what is the current balance in my account?"
"Send 1000 to Ananya"

It should find the intent of the user and map the appropriate action to be perfomed.

Flutter app https://github.com/joshsoftware/voice-banking/tree/PoC is partially done and backend also partially done(@krsonal, @Selectus2 and @sethu have done initial implementation).

Build android sdk, iOS and web app to showcase in the lingo page