Review the project setup experience

Today, tsc --init creates a big-ol' file that is super intimidating. We try to provide comments and blocks of sections to give people a clear separation of config concerns. We also provide a link to https://aka.ms/tsconfig.json.

We also have a belief that most people don't even use tsc --init.

That said, there are problems, and tsc --init doesn't make it totally clear what the "best practices" are for starting a project. Things that are missing:

• Project layout guidance (e.g. src, tsconfig naming)
• "well known"/"blessed" flags as opposed to just ONE BIG PAGE of ALL THE FLAGS 😨
• Easy way to find the information regardless of whether a user used tsc --init

In short:

• Docs for tsconfig.json "getting started"
• Link to that in generated tsconfig.json
• Re-evaluate generated tsconfig content.