I nside Hungary’s dazzling neo-Gothic parliament, the scenes will be solemn on Saturday as the new leader, Péter Magyar, is sworn in. Outside is where the party is expected to unfold, as people pour in from across the country to mark a pivotal moment: the formal end of Viktor Orbán’s 16 years in power. It comes weeks after Magyar and his opposition Tisza party won a landslide victory in a result that rattled the global far right, reset Hungary’s long-strained relationship with the EU and set off all-night celebrations along the banks of the Danube River. He this week called on Hungarians to join him in turning the page on Orbán’s rule and his efforts to turn Hungary into a “petri dish for illiberalism” during his time in power. “We will step through the gateway of regime change with a huge party. Come along, and invite your family and friends!” Magyar wrote on social media.…