Working example for demo

[hrchu]

A working example, e.g., a file browser app to show up how to build a solid app based on solid-file-python.
The app shows how to integrate solid-file-python with Python web frameworks, e.g., Django and flask as well.

For reference

• https://jeff-zucker.github.io/solid-file-client/docs/examples/
• https://podbrowser.inrupt.com/
• https://penny.vincenttunru.com/

[josix]

I can try to solve this issue, please feel free to assign this issue to me.