Include code files

[Dreamsorcerer]

It would be great to have a way to include code files into README.rst. By separating the code to another file, we can do static type checking etc. on our examples to ensure they are always running correctly.

[dchsueh]

I vote for this issue - support literalinclude

https://sublime-and-sphinx-guide.readthedocs.io/en/latest/code_blocks.html#show-example-code

[github-actions]

Stale issue message

[Dreamsorcerer]

Stale issue message

Someone clearly spent a lot of time editing that template. :P