github bot should bridge reactions from matrix into github if the user reacting is authed

[ara4n]

[aaronraimist]

Example: but it should probably bridge reactions to both messages, the !github create message and the one sent by the GitHub bot.

[Mikaela]

What if the user has already reacted to the issue at GitHub or removes reaction from the bot?

[t3chguy]

If user has already done that same emoji reaction then noop, otherwise append. If removing then remove if it's still there else no-op

[Biep]

Emojis for duplicates should also transfer to the main version of the issue - in general. Maybe this should be interactive, as "duplicates" can still have a different slant.

[t3chguy]

I don't think Github has the concept of Duplicates at the API level yet