main idea

add a way for a spectator bot to show up as a bot with the bot tag in a message
- just like chat: {bot: true} basically
- having this would make it show as a bot in the web UI and discord
add a system for custom profile images that can be defined per chat message
- image shows as circle in chat row, like discord icons, or as the webhook icon
- only accept image URLs
- chat: {profileImage: "https://image.com/image.png"}
add setting in server config for the overseer's image URL
- only do this with overseer control service, not the old llm commentary service
make bot: true messages show up as "name [BOT]" or something in discord instead of like now "name - No rover"
make spectators show as "name [SPECTATOR]" in discord, again instead of the current