By Jan Lopatka, Michel Rose and Sabine Siebold PRAGUE (Reuters) -Leaders of the European Union and neighbours from Britain to Turkey met on Thursday to discuss security and energy emergencies plaguing them all since Russia’s invasion of Ukraine, a symbolic summit that underlined Moscow’s isolation. The gathering in Prague was the inaugural meeting of the European Political Community (EPC), a brainchild of French President Emmanuel Macron, bringing together on an equal footing the EU’s 27 member states and 17 other European countries. Some of the countries are waiting to join the EU while anoth…