[Feature] Add bot status message, with prefix help command

[ctsstc]

As a forgetful user I would like to know what the prefix is for the bot. This is especially important when trying to remember what the prefix is for staging vs production.

Note: We may need to update our discord js library to support the latest and greatest features. We should be trying to keep it up to date anyways 🚀

Acceptance

• When clicking on the bot's profile you should be able to see the given prefix and the help command for reference to get people started with the bot.
  • ie: !help
    • To get started type ;help
• Display the current bot version as well
  • If possible display the SHA on staging as well (more info in [Command] Debug #78 )

Useful Links

• https://discord.js.org/#/docs/main/stable/class/ClientUser?scrollTo=setActivity
• https://discord.js.org/#/docs/main/stable/typedef/ActivityType
  • I think LISTENING or possibly CUSTOM_STATUS should work best
• via: https://stackoverflow.com/questions/55095596/discord-bot-status-from-playing-to-watching

Examples

Here are some examples of other bots.
Not yet sure I've seen a custom status yet though, so that could be interesting.

Listening

Playing