implemented models and logic for Cheval, Course, CourseCheval and Pari.

src/main/java/com/pmumali/plr/dtos/CourseDto.java

@@ -0,0 +1,7 @@
+package com.pmumali.plr.dtos;
+
+import java.time.LocalDateTime;
+
+import com.pmumali.plr.enums.CourseStatue;
+
+public record CourseDto(Long id, String nom, String lieu, LocalDateTime departureDateTime, CourseStatue status){}