NEW YORK — The field of the nominees for the 75th annual Tony Awards was set in stone on Monday morning, as the theater industry shakes off the coronavirus pandemic and prepares to celebrate a season packed with powerful plays. “A Strange Loop,” a new, meta musical about a Black gay dramatist creating a musical, led the field with 11 nominations, including a nod in the best new musical category. “Paradise Square,” a new musical spun from a neighborhood of Irish immigrants and African Americans in Civil War-era lower Manhattan, picked up 10 nominations, as did “MJ,” a musical drawn from the son…