Add Genetic Perturbations

[BAevermann]

Genetic perturbations are one of the pillars of the Billion Cell Project. We will want to have publishing support by the end of the embargo period.

Experimental schema and corresponding validator already complete.

Proposal for discovery ETA EOQ

[brianraymor]

@BAevermann to add draft proposal by EOW. @jahilton and @brianraymor to review and make decision about delivery.

[BAevermann]

The draft proposal is in the "genetic perturbation" tab within this development doc.

Today we raised a new area of concern around capturing this information in .var vs .obs. I believe the concepts are stable but how / where to apply is still an area of discussion. This mostly hinges around whether CxG will want to collect the count data for the guides in high throughput assays...