Include reactions in Message type

[LukaHorvat]

So I don't know if this is a newer change in the API but reactions are now returned when querying messages (even in bulk). The current type https://github.com/aquarial/discord-haskell/blob/master/src/Discord/Internal/Types/Channel.hs#L229 doesn't have a reactions field as documented in https://discord.com/developers/docs/resources/channel#message-object.

In my testing, the field is missing if there are no reactions.

[aquarial]

Interesting. Might be new, might have overlooked. Added MessageReaction to Message field, good note that the field is missing if no reactions.

It's got different fields than the ReactionInfo that comes with MessageReactionAdd, so I had to add a struct.

Potentially confusing that , but I'm not sure what else to do.

[LukaHorvat]

Cool! Thanks for the quick work!