By Yves Herman and Gabriela Baczynska STRASBOURG (Reuters) -The European Commission on Wednesday unveiled a series of proposals to curb the energy price spike that has rocked Europe in the wake of Russia’s invasion of Ukraine, while stressing that the EU’s solidarity with Kyiv would be “unshakeable.” Energy prices and inflation have surged across the 27-nation European Union as Moscow slashed gas supplies in response to sanctions, prompting some, in particular on the far-right, to argue that the sanctions were hitting the EU more and should be softened. But with Ukrainian first lady Olena Zele…