Create lobby component

[scott-coates]

Description

Create the lobby component. This component should appear on the /create route after the user provides their name. We will handle the /join route later.

Requirements

• Provide a prop for the component that lets the game creator edit the lobby options.
• Provide a list of all categories with at least 1 valid question.
• Make a list of users currently in the lobby. For now, populate this list with the current user. Do NOT add any other users to this list yet. Just pass in the current user. We will pull users from the database in another task.
• Create a start button. It can only be enabled when there are at least 2 players. Do NOT make the Start Game button functional yet, that's in another task.
• Do NOT make the Room Code functional yet, because yep, that's in another task. Just hard code a number for now
• Do NOT handle the /join route now, that comes later.