Adds the ability to create a project using an existing in the Payload
repo example through `create-payload-app`:
For example:
`pnpx create-payload-app --example custom-server` - creates a project
from the
[custom-server](https://github.com/payloadcms/payload/tree/main/examples/custom-server)
example.
This is much easier and faster then downloading the whole repo and
copying the example to another folder.
Note that we don't configure the payload config with the storage / DB
adapter there because examples can be very specific.
The auth example was not properly awaiting `getHeaders` from
`next/navigation`. This was simply outdated, as this function was
changed to async over the course of the various RC versions during our
beta phase.
The auth example was still on `v3.0.0-beta.24`, was missing its users
collection config, and was not yet using the component paths pattern
established here: #7246. This updates to latest and fixes these issues.
This example can still use further improvements and housekeeping which
will come in future PRs.
In effort to keep the Examples Directory as easy to navigate as
possible, and to keep the Payload Monorepo only as verbose as it needs
to be, we need to remove all alternatives from the Examples Directory.
This includes setups that interact with Payload from a standalone
server, keeping only the Payload recommended "combined" Next.js +
Payload setups. This will also be applied to all other examples that use
this setup, i.e. draft preview, live preview, etc.
