The biggest hold-up was missing fields (`premium_tier`, `welcome_screen`, etc.) but it looks like someone has provided a helpful function called `createGuild(...)` to provide sensible default values. This commit fixes the errors related to creating a guild from a template. I've also refactored the code to include roles and channels in the template. To make sure that the @everyone role is cloned correctly, when creating the guild from a template, we check if the role's ID matches the template's `source_guild_id`. If it does, we set the @everyone role to the new guild's ID.