Add use Korean to slash_command()

[happy-jin1234]

Summary

Fixed an issue where the Korean slash_command name is supported in Discord but not in this module.

Checklist

• If code changes were made then they have been tested
  • I have updated the documentation to reflect the changes
  • I have formatted the code properly by running black .
• This PR fixes an issue
• This PR adds something new (e.g. new method or parameters)
• This PR is a breaking change (e.g. methods or parameters removed/renamed)
• This PR is not a code change (e.g. documentation, README, ...)

[vcokltfre]

That regex should in fact be ^[\w-]{1,32}$ to be in line with Discord's API docs. If we do it this way then we end up with a huge amount of characters and scripts in that regex and it becomes unreadable and less efficient.

[vcokltfre]

see Application Command Naming

[thesadru]

We shouldn't handle the characters of any specific language but getting rid of the islower check is a good idea

What about

name = name.lower()
assert re.fullmatch(r"[\w-]{1,32}", name), "..."

[EQUENOS]

Are you sure that Korean slash command names are supported? Looks like they're not (according to Application Command Naming)

[happy-jin1234]

Are you sure that Korean slash command names are supported? Looks like they're not (according to Application Command Naming)

It seems supported

[thesadru]

They must be supported. Localization wouldn't be possible if they weren't.