Document an example on remote modules + local module

When talking with @russwolf, I realized we dont have an example demo for an application where there is one remote module along with local module.

e.g.

```
apiVersion: skaffold/v2beta11
kind: Config
requires:
- git:
repo: https://github.com/GoogleContainerTools/skaffold
path: examples/multi-config-microservices/leeroy-app
ref: main

- path: ./leeroy-web

```
and
```
apiVersion: skaffold/v2beta22
kind: Config
metadata:
name: web-config
requires:
- path: ../base
build:
artifacts:
- image: leeroy-web
requires:
- image: base
alias: BASE
deploy:
kubectl:
manifests:
- kubernetes/*
portForward:
- resourceType: deployment
resourceName: leeroy-web
port: 8080
localPort: 9000
```

It will be cool to demo this set up to your users.