A TO Z, premiering tonight on NBC at 9:30/8:30c, is a charming show about Andrew (Ben Feldman, whom I adore) and Zelda (Cristin Milioti, whom I also adore) who locked eyes at a concert years ago, and now they live and work near each other, which Andrew deems fate and Zelda deems coincidence. The show follows the would-be couple from their meet cute to what happens to their relationship, and every little thing between.  There’s a (cliched) bearded sidekick and