chore(examples): removes nested docs, redirects, virtual fields, custom server, and hierarchy examples (#9112)

Removes examples that are now duplicative or unnecessary due to new
features in 3.0:

### Custom server

This one can be removed in favor of [Next.js
documentation](https://nextjs.org/docs/pages/building-your-application/configuring/custom-server)

### Hierarchy

The new `join` field can solve for many of the use cases for the
`hierarchy` example. Bi-directional relationships with the `join` field
should be preferred here.

### Nested Docs, Redirects

Our website template showcases how to use the `nested-docs` and
`redirects` plugins in-depth, with real-world examples.

### Virtual Fields

Virtual fields have gotten significantly easier and can now be defined
by specifying `virtual: true`. Not a big need for a full example any
longer.

---------

Co-authored-by: Jacob Fletcher <jacobsfletch@gmail.com>

examples/draft-preview/payload/src/seed/home.ts

@@ -1,43 +1,35 @@
 import type { Page } from '../payload-types'
 
 export const home: Partial<Page> = {
-  title: 'Home Page',
   slug: 'home',
   _status: 'published',
   richText: [
     {
       children: [
         { text: 'This is a ' },
-        { type: 'link', newTab: true, url: 'https://nextjs.org/', children: [{ text: '' }] },
+        { type: 'link', children: [{ text: '' }], newTab: true, url: 'https://nextjs.org/' },
         { text: '' },
         {
           type: 'link',
-          linkType: 'custom',
-          url: 'https://nextjs.org/',
-          newTab: true,
           children: [{ text: 'Next.js' }],
+          linkType: 'custom',
+          newTab: true,
+          url: 'https://nextjs.org/',
         },
         { text: " app made explicitly for Payload's " },
         {
           type: 'link',
-          newTab: true,
-          url: 'https://github.com/payloadcms/payload/tree/main/examples/redirects',
-          children: [{ text: '' }],
-        },
-        { text: '' },
-        {
-          type: 'link',
+          children: [{ text: 'Draft Preview Example' }],
           linkType: 'custom',
           newTab: true,
           url: 'https://github.com/payloadcms/payload/tree/main/examples/draft-preview/payload',
-          children: [{ text: 'Draft Preview Example' }],
         },
         { text: '. This example demonstrates how to implement draft preview into Payload using ' },
         {
           type: 'link',
+          children: [{ text: 'Drafts' }],
           newTab: true,
           url: 'https://payloadcms.com/docs/versions/drafts#drafts',
-          children: [{ text: 'Drafts' }],
         },
         { text: '.' },
       ],
@@ -47,30 +39,31 @@ export const home: Partial<Page> = {
       children: [
         {
           type: 'link',
-          linkType: 'custom',
-          url: 'http://localhost:3000/admin',
-          newTab: true,
           children: [{ text: 'Log in to the admin panel' }],
+          linkType: 'custom',
+          newTab: true,
+          url: 'http://localhost:3000/admin',
         },
         { text: ' and refresh this page to see the ' },
         {
           type: 'link',
+          children: [{ text: 'Payload Admin Bar' }],
           linkType: 'custom',
           newTab: true,
           url: 'https://github.com/payloadcms/payload-admin-bar',
-          children: [{ text: 'Payload Admin Bar' }],
         },
         {
           text: ' appear at the top of this site. This will allow you to seamlessly navigate between the two apps. Then, navigate to the ',
         },
         {
           type: 'link',
+          children: [{ text: 'example page' }],
           linkType: 'custom',
           url: 'http://localhost:3001/example-page',
-          children: [{ text: 'example page' }],
         },
         { text: ' to see how we control access to draft content. ' },
       ],
     },
   ],
+  title: 'Home Page',
 }