Chat wire protocol (#3125)

* core: remove file extension from emoji name

* web: transform emotes to labels when sending

* chat: replace br with line break

* core: implement emoji cache

* chat: send shortcodes for custom emoji

* chat: correct esling errors

* core: move emoji injection into dedicated function

* emoji: integrate emoji into markdown renderer, fix formatting

* chat protocol: correct golangci-lint findings

* chat field: specify that the contentEditable is an HTMLElement

* admin: mention that emoji should have unique names

* Prettified Code!

* regenerate pack-lock

* chat: correct the emphasis tag, provide fallback for other elements

---------

Co-authored-by: jprjr <jprjr@users.noreply.github.com>

go.sum

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