WASHINGTON — Special Envoy Steve Witkoff and President Trump’s son-in-law Jared Kushner’s bold move meeting Hamas terrorists in-person during the cease-fire negotiations last week played a significant role in securing the historic peace deal that saw an end to the war in Gaza, sources tell The Post. Hours after arriving in Egypt, the duo helped push through remaining hurdles preventing Hamas from signing on to the US-brokered peace deal , which brought the bloody conflict to a close and secured