By the time the sun had reached its peak on Sunday, a public space had sprouted along Nevada City's Commercial Street. Where cars were parked the evening prior, benches and planter boxes sat atop a stained wood-deck platform connected to the sidewalk along the historic downtown corridor. And if the boardwalk proves to be popular and not a burden to maintain, it could be the first of several more pedestrian spaces downtown. "To me, it's part of the overall picture of what many groups are saying they want to see in town - a more pedestrian friendly community," said Duane …