White House envoy Steve Witkoff will travel to Moscow next week, the Kremlin said, amid accelerating efforts to cement a US-backed peace proposal that many Ukrainians -- and European leaders -- are wary of.The meeting in Moscow, confirmed by foreign policy adviser Yuri Ushakov on November 26, came hours after US President Donald Trump suggested Witkoff, and possibly Trump's son-in-law Jared Kushner, would fly to the Russian capital.Witkoff, a real estate developer with no diplomatic background whom Trump has charged with leading efforts to find…