wishlist: mark known bots as bots and add links to documentation

[AlexDaniel]

Currently, bot messages appear like this:

I think it can be helpful if we kept a list of known bots and links to documentation for them. This way, camelia can appear in the logs like this:

camelia 🤖      ComplexStr.new(<0.96875+200i>, "0xf.8*:2[1,0]**0b11/0o200+2.0e2i")

Basically, an icon to indicate a bot (🤖 or ⓘ, doesn't matter), and if you hover or click on it, it can explain that it's a bot and point to the documentation about it. At least, whateverable bots are well documented, I think some other bots are too.