Add a save() function to player managers

src/main/java/emu/grasscutter/game/player/BasePlayerManager.java

@@ -12,4 +12,11 @@ public abstract class BasePlayerManager {
     public Player getPlayer() {
         return this.player;
     }
+    
+    /**
+     * Saves the player to the database
+     */
+    public void save() {
+        getPlayer().save();
+    }
 }