Gare St Lazare / Conceived and created by Judy Hegarty Lovett, Paul Clark, Conor Lovett, and Caoimhín Ó Raghallaigh / Includes texts from Samuel Beckett’s “Watt,” “The Unnamable,” “First Love,” “Words and Music,” and “Malone Dies” / Directed by Judy Hegarty Lovett (ArtsEmerson)