Use Prisma's programmatic API for keystone-next generate

[emmatown]

Same as the previous PRs about using Prisma's programmatic APIs. See the changeset for the options that it accepts.

[changeset-bot]

🦋 Changeset detected

Latest commit: cc979cb

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 29 packages

Name	Type
@keystone-next/keystone	Major
@keystone-next/adapter-prisma-legacy	Major
@keystone-next/types	Major
@keystone-next/test-utils-legacy	Patch
@keystone-next/benchmarks-legacy	Patch
@keystone-next/example-auth	Patch
@keystone-next/app-basic	Patch
@keystone-next/example-ecommerce	Patch
keystone-next-app	Patch
@keystone-next/example-roles	Patch
@keystone-next/example-sandbox	Patch
@keystone-next/example-todo	Patch
@keystone-next/admin-ui	Patch
@keystone-next/auth	Major
@keystone-next/fields-auto-increment-legacy	Patch
@keystone-next/fields-location-google-legacy	Patch
@keystone-next/fields-mongoid-legacy	Patch
@keystone-next/fields-oembed-legacy	Patch
@keystone-next/fields-unsplash-legacy	Patch
@keystone-next/fields-legacy	Patch
@keystone-next/cypress-project-access-control-legacy	Patch
@keystone-next/cypress-project-basic-legacy	Patch
@keystone-next/cypress-project-client-validation-legacy	Patch
@keystone-next/cypress-project-login-legacy	Patch
@keystone-next/fields-document	Patch
@keystone-next/api-tests-legacy	Patch
@keystone-next/admin-ui-utils	Patch
@keystone-next/cloudinary	Patch
@keystone-next/fields	Patch

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

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✅ Preview: https://keystone-next-git-prisma-migrate-generate-migration-key-80da1c.vercel.app

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Sandbox	Source
@keystone-next/example-sandbox	Configuration

[timleslie]

Looks good 👍