Wire Up Reply Bar in Feed

[Blakemcw]

Right now the reply bar is just there for looks. "Wiring it up" includes:

• Adding a new message to a post when a user submits
• Adding a way to select emojis and add them to the reply bar

Both of these can be completed by adding the \ component to \. \ needs to be separated from the file Chat.js and given its own file in src/Inputs.