Create SDDS project contribution opportunities

Here's the doc:

https://www.drupal.org/community-initiatives/starshot-demo-design-system... →

Assigning to Jacob for review.

Kristen Pol → credited jacobadeutsch → .

Jacob read through and didn't find anything obvious to update here. I'll leave this open for a day or two for others to take a look.

Kristen Pol → credited sea2709 → .

Incorporated feedback from @sea2709.

Update parent.

Automatically closed - issue fixed for 2 weeks with no activity.