Clean project: remove test files, debug logs, and add documentation

unionflow-client-quarkus-primefaces-freya/src/main/java/dev/lions/unionflow/client/dto/SouscriptionDTO.java

@@ -5,6 +5,7 @@ import java.io.Serializable;
 import java.math.BigDecimal;
 import java.time.LocalDate;
 import java.time.LocalDateTime;
+import java.time.temporal.ChronoUnit;
 
 public class SouscriptionDTO implements Serializable {
     
@@ -228,7 +229,7 @@ public class SouscriptionDTO implements Serializable {
     
     public long getJoursRestants() {
         if (dateFin != null) {
-            return LocalDate.now().until(dateFin).getDays();
+            return ChronoUnit.DAYS.between(LocalDate.now(), dateFin);
         }
         return 0;
     }