[CHECKLIST] READMEs for all Blueprints

[Tjemmmic]

Overview

As we build out Blueprints to show off their uses, we want to make sure that we have clear READMEs for all of them.

Checklist

• [x] Tangle Incredible Squaring Blueprint
• [ ] Eigen Incredible Squaring AVS Blueprint
• [ ] MPC Blueprint
• [ ] Tangle AVS Blueprint
• [ ] BLS Aggregator Blueprint