Document process / compile FAQ for creating BIDS Apps

[patrick-g-h]

Working together with Daniele, Asier and Madhur to document the process of creating a BIDS app. This will most likely be a page on the wiki!

[emdupre]

Excited to see this documented ! Just to add one helpful resource: there's example BIDS App repository

[patrick-g-h]

Thanks for the helpful link!

Check out the new wiki page and let me know what you think: https://github.com/INCF/BIDS-Starter-Kit/wiki/BIDS-Apps-Help

[KirstieJane]

This looks great @Park-Patrick! I made a few changes (a little bit of formatting and a couple of new links) but definitely looks awesome ✨