[Akeru Web App] Displaying all existing threads for a user

[multipletwigs]

Description
On the far left column of the layout, there's some mock data existing for the thread titles. However no styling as been applied to it yet, and we should try and obtain the data from our existing endpoints.

Tasks

1. Add a loading skeleton when fetching.
2. Display thread titles that truncates when it exceeds a wrap.
3. Add in hover states, selected states, etc for UX feedback (anything you can think of, please refer to actual assistants playground)