The original documentation was unnecessarily complex - you don't need to
import the original interface and extend from it in order to add
additional properties to it via module augmentation.
- Adds missing types, especially the `Where` type. Will be helpful for
people to see that they can type their queries like that
- Mention pnpm first and prefer pnpm > npm > yarn throughout docs
- Add `payload` to function arguments in examples to discourage people
from doing `import payload from 'payload'`
- PNPM => pnpm, NPM => npm
- Fix some typos
### What?
I noticed a spelling error in the banner of the beta docs and decided I
could save everyone some time by *running the entirety of the beta docs*
through a spellchecker.
### Why?
To fix many spelling and formatting mistakes at once.
### How?
By enabling `edit mode` in my browser and letting the built-in
spellchecker perform its magic (and changing _only_ where it made
sense).
~~Ironically, the original spelling mistake that inspired me to do this
remains unchanged as that is a part of the website repo. [PR for that is
here](https://github.com/payloadcms/website/pull/388).~~
