Provide mappings for custom server emojis

[EthanThatOneKid]

What do we need?

There are some emojis sent within messages which may be unique to that chatroom. Mappings should be provided for the custom emoji IDs and their information.

Resources

• https://discord.com/developers/docs/resources/emoji
• https://api.slack.com/methods/emoji.list

[diamondburned]

discordmd parses emojis: https://pkg.go.dev/github.com/diamondburned/ningen/v3/discordmd#Emoji