Enhanced Discord Support (#7005)

* Add Discord Provider Prototype

* Add Discord Logo

* Add Plugin to Plugin Manager

* fixed discord auth support and added icon

* add csv role verification

* grab discord server icon and test server id and roles

* subdomain derived from server name

* use discord server specific nickname if available

* Cleanup and comment

* move discord api types to dev deps

* cleanup of server vs default params

* remove commented out lines

* revert envv.development

* revert in vscode

* update yarn lock

* add gif support for discord server icon

* add comment with docs link

* add env section for discord

* fix errors and clarify env

* add new cannot use without

* fix suggestions

plugins/discord/server/discord.ts

@@ -0,0 +1,18 @@
+import invariant from "invariant";
+import OAuthClient from "@server/utils/oauth";
+import env from "./env";
+
+export default class DiscordClient extends OAuthClient {
+  endpoints = {
+    authorize: "https://discord.com/oauth2/authorize",
+    token: "https://discord.com/api/oauth2/token",
+    userinfo: "https://discord.com/api/users/@me",
+  };
+
+  constructor() {
+    invariant(env.DISCORD_CLIENT_ID, "DISCORD_CLIENT_ID is required");
+    invariant(env.DISCORD_CLIENT_SECRET, "DISCORD_CLIENT_SECRET is required");
+
+    super(env.DISCORD_CLIENT_ID, env.DISCORD_CLIENT_SECRET);
+  }
+}