Point to a minial example repository in the author guideline doc

[htwangtw]

This is an insight from discussion with @mirhnius at Brianhack Montreal 2023. (Niushia please feel free to chime in.)

For people who has never used binder, the first hurdle is how to make their repository work with binder. Having an minimal example, or point readers to an existing preprint with a simple set up might be a good idea.

[htwangtw]

https://github.com/pbellec/editorial_parcellation/

or highlight https://github.com/neurolibre/template
I didn't realise a template exists

[mirhnius]

Perhaps you could make it stand out under "quick start" or some other attention-grabbing heading.

[htwangtw]

that's a good idea! Do you want to start a PR?
Feel free to open issue if you spot more errors in the doc

[htwangtw]

I think this can be combined with neurolibre/neurolibre#50
So we have a minimal example plus using roboneuro as a quick start