rewrite plus

I don't feel like calling this "v1.0.0" because we're not there yet, but despite the minor version increment it's a big release because it's a complete rewrite — everything's now mostly written from scratch (some bits copied from iCrawl's yuudachi, hence the license change).

slabbot now also uses discord.js v14 alone (previously v12 + Akairo Framework). Something something futureproof-er.

Mostly has feature parity. Some stuff has been renamed, some stuff has been removed.

• me is now /slabbot profile — conflicting with built-in slash command.
• about has been moved to /slabbot about.
• decide now uses a bajillion options.
• the shutdown command is gone.
• the help command is gone.
• the commit hash in about is gone.
• my name is now "12beesinatrenchcoat" instead of "AndyThePie".

And probably some other stuff I'm forgetting.

So yeah, maybe I'll actually come back to maintaining this. Maybe I'll just let slabbot remain dormant again for another year. Who knows.

…oh yeah, happy belated 2nd birthday, slabbot. You've changed my life. Thanks.

Full Changelog: https://github.com/12beesinatrenchcoat/slabbot/commits/v0.5.0-indev