By Kanishka Singh (Reuters) – San Francisco’s homeless are suing the City by the Bay, demanding that it stop rounding them up like criminals and invest in affordable housing instead. More than 57% of the city’s homeless is unsheltered, according to advocacy group Coalition on Homelessness, which filed the lawsuit along with seven homeless individuals. San Francisco has failed to provide enough temporary shelters, the group said on Wednesday when announcing the action. San Francisco has close to 8,000 homeless people, according to the city’s website. “The City’s decades-long failure to adequate…