By Yuka Obayashi, Emily Chow and Ron Bousso TOKYO/LONDON (Reuters) – President Vladimir Putin has raised the stakes in an economic war with the West and its allies with a decree that seizes full control of the Sakhalin-2 gas and oil project in Russia’s far east, a move that could force out Shell and Japanese investors. The order, signed on Thursday, creates a new firm to take over all rights and obligations of Sakhalin Energy Investment Co, in which Shell and two Japanese trading companies Mitsui and Mitsubishi hold just under 50%. The five-page decree, which follows Western sanctions imposed …