SINGAPORE (Reuters) - Singapore Airlines (SIA) will cut capacity by 96%, ground almost its entire fleet and impose cost cuts affecting about 10,00 staff because of coronavirus travel curbs it described as the "greatest challenge" it has ever faced.The global aviation industry is struggling to absorb shocks from the pandemic, with airlines across the world grounding fleets, placing thousands of workers on unpaid leave and seeking state bailouts to survive the crisis..The measures by SIA,..