Allow user to connect to discord to display discord handle

What's included in this pr + description

loom demo: https://www.loom.com/share/26e9182e263642adb6bcc4ae77727dd3

The goal of this pr is to add discord handles to a user's profile so that people have a means of contacting each other.

I added the discord handle to the AccountMediaObject which already includes the pfp + address/ens.

To support discord connection, I added the discord connection code that was part of member directory.

Motivation & context

Alli from foxes asked for a way to contact contributors who are proposing to the foxes rfps.

The ideal use case for them is to have an input on the proposal form itself be a required field, but in reality it would most likely need to be that discord connection is a required step within the proposal. That's doable, but can come after this pr.

Steps to test

This only runs on localhost right now because I haven't performed migrations on staging
Connect your wallet and visit your workspace settings
Connect to Discord
Your discord handle should now appear next to your pfp
If you don't have a display name or ens, your discord username should now be your display name. likewise, with your pfp, if you don't have one, it will be populated by the discord pfp

Outstanding issues

A majority of this pr is adding back old code from member directory days. Additionally, I added back the discordId on the Account object, but instead of it being an Int it's now a String and it's no longer unique in case a single account with many addresses wants to use the same discord id. Let me know if there are any issues with that!

Relevant docs

The api we're calling to get the user object from discord https://discord.com/developers/docs/resources/user#user-object

0xStation / proposer