Gate theatre, DublinThe comedian turns on the roguish charm as part of a dazzling cast that inject new poignancy into the absurdist classic One of Samuel Beckett's most celebrated plays, Endgame can seem unapproachably austere in its depiction of a living hell. In Danya Taymor's vibrant new production, the abstraction of four characters trapped in a room after some unspecified catastrophe has new resonance: there is …