add /prestige

src/main/java/sh/okx/rankup/prestige/Prestiges.java

@@ -0,0 +1,20 @@
+package sh.okx.rankup.prestige;
+
+import org.bukkit.configuration.file.FileConfiguration;
+import org.bukkit.entity.Player;
+import sh.okx.rankup.RankList;
+import sh.okx.rankup.Rankup;
+
+public class Prestiges extends RankList<Prestige> {
+  public Prestiges(Rankup plugin, FileConfiguration config) {
+    super(plugin, config, section -> Prestige.deserialize(plugin, section));
+  }
+
+  @Override
+  public Prestige getByPlayer(Player player) {
+    return ranks.stream()
+        .filter(rank -> rank.isIn(player))
+        .findFirst()
+        .orElseGet(this::getFirst);
+  }
+}