Suggestion: Include the Feathers example app in the mono-repo #2233

This came up in a slack thread, but I thought it would be worth elaborating here.

I propose adding a new top-level directory to the mono-repo called examples/ or something to that effect. This directory could house the official feathers sample app, and possibly more.

The major benefit for moving the app into the main repo is that we could use it as a canary for breaking changes -- especially typing only changes, or detecting when @types/express breaks something.

The only downside that I'm aware of is that trying out the sample app would be less convenient, since it would require cloning the whole mono-repo and cd'ing to the example directory.

Thoughts?

Edit to add a visual:

.
├── (mono-repo config files)
├── packages/
│   ├── adapter-commons
│   ├── authentication
│   ├── errors
│   ├── feathers
│   └── ... etc
└── examples/
    ├── feathers-chat-ts
    └── feathers-chat (?)