[lit-starter] Revamp the entire Lit starter experience

This is a tracking issue for a larger overall project to revamp the entire lit starter kit experience from features to DX.

We will implement this into the CLI

Proposed targets:

1. Implement minimal / maximal github template starter kits of:

• component
• design system
• application

2. Make templates accessible / easily clonable via CLI

Can be a part of the Lit CLI or npm create

3. Implement tooling to construct a starter kit via CLI

It would be preferable to not have so many repos for starter kits but rather for a user to just use the CLI to construct a starter kit with only the features they want.

If we have the support capacity, it'd be preferable to make a generalizable tool like a modern successor to yeoman so that we can even put this functionality in the open-wc CLI to reduce their support burden on the project setup.