fix: interfaces not importing due to re-export of Snowflake

[iShibi]

Please describe the changes this PR makes and why it should be merged:

This PR tries to fix the issue caused by re-export of Snowflake in #5722. The re-export of Snowflake made all the interfaces and types of discord.js non-importable. I tried to find a correct way of re-exporting types in a declaration file but couldn't find anything that helped. So, instead of importing the Snowflake type from discord-api-types, I defined the type in the lib itself just like other types. This kept the typings support that Snowflake introduced while also made it and other types importable again.

Thanks, @ToasterSticks for noticing a issue...again 😆

Status and versioning classification:

• I know how to update typings and have done so, or typings don't need updating

[kyranet]

What about doing this instead?

export { Snowflake } from 'discord-api-types/v8';

Alongside the import, it's a pattern I used in my early days and it always worked.

[iShibi]

I did try that (but only outside the declare module) while I was looking for possible fixes but doing so was somehow making the other typings modules like @discordjs/collection and ws not importable in the declaration file. Doing so inside the declare module alongside the import isn't showing this error but it also doesn't fix the issue. The only fix that I can see until the rewrite of declaration file is exporting all the interfaces and types explicitly.

[monbrey]

Can't apply suggestions on the deleted lines, but

    Snowflake as APISnowflake, // from api-types
    
    type Snowflake = APISnowflake; // inside module

This seems to resolve it for me