No slug

[Explosion-Scratch]

I can't find a slug property in any page, but this code seems to suggest that there is, or at least at one point was:

https://github.com/noahsalvi/sotion/blob/ab2615b8157dffcde9fb96f4d2127660b7398268/src/sotion.ts#L94-L97

In addition, the sotion library barely works without the slug property on any page.