Add a property to Autocompletion to only allow sent values

[Harvle]

Feature Description

Adds a new property to the ApplicationCommandOption structure that will only allow the user to send an option from the autocompleted list, like how choices currently work.

Example Use Case

A bot has commands that use internally stored IDs to manage information (warns, bans, kicks, quotes, tickets, etc...). These IDs can't be stored in a hard-set choice array, so autocomplete has to be used here. The issue is that currently, a user can enter something that isn't in the list, which would then require validation on the developer's end.

Ideal Solution

Adding a property to the ApplicationCommandOption structure, called something like strict_autocomplete: boolean would allow developers to decide whether the returned options are the only ones users can use in their commands.

[AlmostSuspense]

This is a duplicate of #4882

• Ability to 'lock' option value to only autocompleted values #4882