some discord bots

tempbot deletes messages after 30 min, checks every 5 min
- needs env disgo_token and disgo_guild_id
- and a text channel called ⌛-temp
vcbot automatically creates and deletes channels and logs join/leave
- needs env disgo_token and disgo_guild_id
- and a text channel called 📋-voice and a category called 🔊-talk
welcomebot
- needs env disgo_token and disgo_guild_id
- and the following text channels 🔨-rules, ❕-info and 👋-welcome
- and a group called Apple and Apple Core
- the bot group needs to be above Apple
funbot
- needs env disgo_token, disgo_guild_id and disgo_imgur
- TODO: make global and remove disgo_guild_id