The Greater Richmond Partnership launched a Web site this week aimed at helping area residents find local jobs. RichmondJobNet.com is free and intended for people who have been laid off or are searching for a new career. “We recognize it’s a challenging environment,“ partnership president and chief executive Gregory H. Wingfield said. “By providing a central site to support job seekers and promoting the many career opportunities our region has to offer, we hope to help individuals transition into new jobs in our market.“