Documentation: Add a page or section for the Payload Way to seed data

[corysimmons]

A coworker and I were looking for a way to seed Payload and ended up doing a bunch of work getting mongo-seeding setup before reaching out on Discord and being handed a link to this file:

payload/test/admin/config.ts

Lines 164 to 182 in 205404a

	onInit: async (payload) => {
	await payload.create({
	collection: 'users',
	data: {
	email: devUser.email,
	password: devUser.password,
	},
	});
	await mapAsync([...Array(11)], async () => {
	await payload.create({
	collection: slug,
	data: {
	title: 'title',
	description: 'description',
	},
	});
	});
	},

If seeding Payload is really that simple, it would be great if that were in the official docs under a "Seeds" section.

🙇