Allow the use of Mentions and Emoji's in Modals

[BotDevPanda]

Currently, You can only input text into a modal. I would like to see the ability to also add mentions and emojis built into Modals.

Different ways to implement:

1. You can create a new type for Emoji's and Mentions
2. You can make it so when someone types @ or : It will start to show emojis/users based on what you entered

[frobinsonj]

Currently, modals are the only supported solution for providing multiline content without message intent (slash commands do not support this). This means it's currently impossible to allow a user to provide multiline content with emojis and mentions in without them copying ids and knowing how Discord's formatting works.

In my opinion, this suggestion would be the ideal solution to this problem.

[DrHeinzDoofenshmirtz]

I would like to add a request to also allow mentions in string select menu options.

[lajawi]

I'd expand this to encompass the full scope of markdown formatting in modal inputs.

Use case: in my case, I'm making my very own message scheduler, and I want the user to be able to input multiline messages, with markdown. Although the markdown works when the message is sent by the bot, the user can't preview it in the modal (I'm using a modal because slash command inputs don't accept multiline strings, and I don't want the bot to wait for a message in chat).