Answer key questions in README.

[MarcSkovMadsen]

Please help interested users by answering key questions in README.

• Why does this project exist?
• When should I use this project? And when should I not use it?
• How mature is this project?
• How do I install this project?
• How do I use this project?
  • How does a "Hello World" Panel Example" look?

[pmeier]

@MarcSkovMadsen we will as soon as we have answers to this. To answer two of them

How mature is this project?

Pre-alpha. It is mostly unusable in its current state. We are working towards bringing this to life.

How does a "Hello World" Panel Example" look?

Not sure if the list above is copy-pasted from panel, but this is not a panel library. All panel specific code will be implemented in panel and not here. panel will not be a dependency of bokeh_fastapi.