[Feature]: Channel Emoji autocompletion

[Xiazee]

Checklist

• [X] This is an issue for Hyperchat, not LiveTL. I will go to the LiveTL repo to report an issue for LiveTL.
• [X] I have checked for a duplicate or similar issue. I made sure to check closed issues as well.
• [X] I am not reporting a bug. If I am, I will use the bug report issue template.
• [X] By submitting this issue, you agree to follow our Code of Conduct

Is your feature request related to a problem? Please describe.

Right now you are not able to autocomplete channel emojis by starting to type either :PrefixEmoji or :Emoji. I would expect them to be available in the list.

Describe the solution you'd like

Channel emojis should be listed along with all regular emojis that match the typed text. The order could be configurable.

Expected behavior

I type :Wave and pick :ChannelWave: from the presented list.

Describe alternatives you've considered

No response

Anything else?

No response