By Jocelyn Ruggiero, Globe correspondent, August 1, 2016 KENNEBUNK, Maine — Chef Rebecca Charles walks me through the first floor of her new restaurant here, in the throes of renovation. Splotches of spackle adorn the walls, and the air is filled with the aroma of freshly cut birch from a just-delivered bar. Piles of lumber and gallons of paint are stacked in the corners, and a new fireplace facade leans up against the old. She leads me up a flight of stairs to what will be the main dining room, Pearl Kennebunk Beach, scheduled to debut in the spring of 2017. Despite the heavy coats of black paint on the…