By Nidal al-Mughrabi CAIRO, July 6 (Reuters) - Hamas said on Monday it had dissolved its de facto government in Gaza and signalled it was ready to hand over to a group of Palestinian technocrats, as it presses Israel to honour other parts of a stalled U.S.-backed peace plan. The group's promise to end the body overseeing ministries — which has run for more than a decade — was a key part of the plan for a post-war Gaza set out by U.S. President Donald Trump after the start of a fragile ceasefire