### What?
Fixes issue with stale locale from searchParams
### Why?
Bad use of useEffect/useState inside our useSearchParams provider.
### How?
Memoize the locale instead of relying on the useEffect which was causing
unnecessary renders with stale values.
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>
