Add new Discord Logger to README

[MahdiBM]

Discord Logger

• I've recently publicized the Discord-logger part of the private Discord stuff I'm using.

• For what it's worth, I've personally moved to the publicized version of the logger since a few days ago, and everything has been going smoothly.

• We're soon going to use the logger in Vapor community's Penny.

• The logger also has a decent amount of tests.

• It does take care of edge cases. For example, the logger:

  • Won't exceed Discord message-length limits. Will try to truncate if possible.
  • Won't exceed its Discord rate-limit when sending logs.
  • Will escape Discord-special characters before sending over to Discord.

  And much more ...

If you need to review the implementation, the logger-related parts of the library are present in the DiscordLogger target and there is a Discord-logger section available in the README.

[ktoso]

Hm, it's not really a stand-alone logger package... but I guess for discord that would be perhaps weird to begin with.

I don't mind adding a link to it :) I see you're handling metadata providers nicely even 👍 Feel free to send in a PR

[MahdiBM]

Yeah its not standalone, and I did think of that. That's why you can only depend on DiscordLogger instead of the whole DiscordBM. It will still pull more stuff than a standalone logger package would, but I think it should be fine.