Add logout button (#653)

## Description:

- Add a logout button, and post to the `/logout` endpoint to end the
session server-side.
- Add an option to log out all sessions by calling the `/revoke`
endpoint. There is button for this yet.
- Depends on https://github.com/openfrontio/infra/pull/32
- This is the last part of #559

## Please complete the following:

- [x] I have added screenshots for all UI updates
- [x] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced
- [x] I understand that submitting code with bugs that could have been
caught through manual testing blocks releases and new features for all
contributors

---------

Co-authored-by: Scott Anderson <662325+scottanderson@users.noreply.github.com>

resources/lang/en.json

@@ -10,6 +10,7 @@
     "join_discord": "Join the Discord!",
     "login_discord": "Login with Discord",
     "logged_in": "Logged in!",
+    "log_out": "Log out",
     "create_lobby": "Create Lobby",
     "join_lobby": "Join Lobby",
     "single_player": "Single Player",