Add menu to pick GitHub emojis

[pwntester]

eg:

setlocal conceallevel=1 concealcursor=nvic
call matchadd('Conceal', ':see_no_evil:', 10, -1, {'conceal':'🙈'})

ref: https://github.com/ikatyang/emoji-cheat-sheet

test Original external issue Submitted by @ahmed532009 https://github.com/github/codeql/pull/7563

[pwntester]

Concealing is a dirty solution since it overrides the background hl. A better approach would be to offer an emoji autocomplete menu trigered on :

[pwntester]

emoji menu is already implemented in Telescope symbols 🎉 we still need concealing if we want to properly show webUI entered emojis though

[st17931]

is this issue still open can i start with this??

[pwntester]

Yep, any work on this is appreciated!