feat: implemented compareTo in the respective enums

src/main/java/hepia/ColourSuit.java

@@ -12,4 +12,9 @@ public enum ColourSuit implements ISuit {
             case CLUB -> "Trèfle";
         };
     }
+
+    @Override
+    public int compareTo(ISuit suit) {
+        return this.ordinal() - ((ColourSuit) suit).ordinal();
+    }
 }

src/main/java/hepia/SpecialSuit.java

@@ -12,4 +12,9 @@ public enum SpecialSuit implements ISuit {
             case KNIGHT -> "Cavalier";
         };
     }
+
+    @Override
+    public int compareTo(ISuit suit) {
+        return this.ordinal() - ((SpecialSuit) suit).ordinal();
+    }
 }