Create & submit google summer of code project proposal

[x] Agree on a useful project
- @KirstieJane & @Islast met on 27 Jan and figured that a focus on visualisation and building a command line tool would be super helpful 😄
[x] Write the proposal
- @KirstieJane & @Islast heavily adapted the tedana:tada: GSOC proposal that @tsalo and @emdupre wrote. Taylor and Elizabeth, please shout if you'd like to be explicitly acknowledged in that application!!
- Here's the draft: https://docs.google.com/document/d/14kTPAP13fDpRXL7xEN5yyx2ozNvtncprToAoelgeYE8/edit?usp=sharing!
[x] Submit the proposal to INCF to get it added to their list of projects 😺

WhitakerLab / scona