feat: add category registration system to admin

src/main/java/fr/titionfire/ffsaf/data/model/RegisterModel.java

@@ -11,6 +11,9 @@ import lombok.Setter;
 import org.hibernate.annotations.OnDelete;
 import org.hibernate.annotations.OnDeleteAction;
 
+import java.util.ArrayList;
+import java.util.List;
+
 @Getter
 @Setter
 @AllArgsConstructor
@@ -46,6 +49,17 @@ public class RegisterModel {
     @Column(nullable = false, columnDefinition = "boolean default false")
     boolean lockEdit = false;
 
+    @ManyToMany(fetch = FetchType.LAZY, cascade = CascadeType.PERSIST)
+    @JoinTable(
+            name = "categories_insc_comb",
+            joinColumns = {
+                    @JoinColumn(name = "id_competition", referencedColumnName = "id_competition"),
+                    @JoinColumn(name = "id_membre", referencedColumnName = "id_membre")
+            },
+            inverseJoinColumns = @JoinColumn(name = "category_id")
+    )
+    List<CatPresetModel> categoriesInscrites = new ArrayList<>();
+
     public RegisterModel(CompetitionModel competition, MembreModel membre, Integer weight, int overCategory,
                          Categorie categorie, ClubModel club) {
         this.id = new RegisterId(competition.getId(), membre.getId());