Is your feature request related to a problem? Please describe.
We have a lot of any types in our frontend. Let's start replacing these with more descriptive types.

Describe the solution you'd like
In all the components in assets/src/components/conversations, replace as many any types with Conversation/Message/Account/User types from https://github.com/papercups-io/paperc

Description:
Implement MVVM(Model View ViewModel) architecture in the project.