feat: breaking: richtext adapter (#3311)

BREAKING: requires user to install @payloacms-richtext-slate and specify a `config.editor` property

* chore: move slate stuff into packages/richtext-slate

* chore: fieldTypes stuff

* chore: fix richtext-slate tsconfig

* chore: add clean:unix command

* chore: fix up things

* chore: undo subpath imports being hoisted up

* chore: fix incorrect imports

* chore: improve AdapterArguments type

* chore: remove unused richTextToHTML and stringifyRichText files

* fix: core-dev scss imports

* chore: fix publishConfig exports for richtext-slate

* chore: adjust joi schema for richtext field

* chore: various fixes

* chore: handle afterRead population in richText adapter

* chore: handle more after-read promise stuff

* chore: fix joi validation

* chore: add richtext adapter to tests

* chore: merge adapter props with field props

* chore: index.tsx => index.ts

* chore: rename `adapter` to `editor`

* chore: fix e2e tests not running due to importing a constant from a file (`Tabs`) which imports createSlate.

This fails because createSlate imports React components.

* chore: remove unnecessary import

* chore: improve various typings

* chore: improve typings for List view Cell components

* feat: richText adapter cell component

* chore: add missing types packages for packages/richtext-slate

* chore: add new adapter interface properties to joi schema

* chore: withMergedProps utility which replaces getSlateCellComponent and getSlateFieldComponent

* feat: added config.defaultEditor property which is now required. field.editor is no longer required and overrides config.defaultEditor

* docs: mention editor and defaultEditor property in the docs

* chore: fix incorrectly formatted JSX in docs files breaking mdx parser

* chore: fix various errors

* chore: auto-generated pointer files

packages/payload/src/config/schema.ts

@@ -81,6 +81,11 @@ export default joi.object({
   debug: joi.boolean(),
   defaultDepth: joi.number().min(0).max(30),
   defaultMaxTextLength: joi.number(),
+  editor: joi.object().required().keys({
+    CellComponent: component.required(),
+    FieldComponent: component.required(),
+    afterReadPromise: joi.func().required(),
+  }),
   email: joi.object(),
   endpoints: endpointsSchema,
   express: joi.object().keys({