Egor Dëmin insists he wasn’t just “sitting on the couch” this summer, using his idle time while recovering from a plantar fasciitis injury wisely and purposefully in preparation for his first season in the NBA. The athletic 6-foot-8 point guard was listed at just 199 pounds when the Nets made him the eighth selection in this year’s draft out of BYU, incredibly making him the franchise’s first lottery pick since Derrick Favors was selected at No. 3 in 2010. But Dëmin has used his downtime to add