Add ExerciceRunningEvents => Describe events of a EventEmitter

types/Dojo/ExerciceRunningEvents.ts

+interface ExerciceRunningEvents {
+    step: (name: string, message: string) => void;
+    endStep: (stepName: string, message: string, error: boolean) => void;
+    logs: (log: string, error: boolean, displayable: boolean) => void;
+    finished: (success: boolean, exitCode: number) => void;
+}
+
+
+export default ExerciceRunningEvents;
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