Improve APIs around riptide tridents (#12996)

Co-authored-by: Bjarne Koll <git@lynxplay.dev>
Co-authored-by: Lulu13022002 <41980282+Lulu13022002@users.noreply.github.com>

paper-api/src/main/java/org/bukkit/event/player/PlayerRiptideEvent.java

@@ -1,6 +1,7 @@
 package org.bukkit.event.player;
 
 import org.bukkit.entity.Player;
+import org.bukkit.event.Cancellable;
 import org.bukkit.event.HandlerList;
 import org.bukkit.inventory.ItemStack;
 import org.bukkit.util.Vector;
@@ -14,13 +15,15 @@ import org.jetbrains.annotations.NotNull;
  * N.B. the riptide action is currently performed client side, so manipulating
  * the player in this event may have undesired effects.
  */
-public class PlayerRiptideEvent extends PlayerEvent {
+public class PlayerRiptideEvent extends PlayerEvent implements Cancellable {
 
     private static final HandlerList HANDLER_LIST = new HandlerList();
 
     private final ItemStack item;
     private final Vector velocity;
 
+    private boolean cancelled;
+
     @ApiStatus.Internal
     public PlayerRiptideEvent(@NotNull final Player player, @NotNull final ItemStack item, @NotNull Vector velocity) {
         super(player);
@@ -54,6 +57,16 @@ public class PlayerRiptideEvent extends PlayerEvent {
         return this.velocity.clone();
     }
 
+    @Override
+    public boolean isCancelled() {
+        return this.cancelled;
+    }
+
+    @Override
+    public void setCancelled(boolean cancel) {
+        this.cancelled = cancel;
+    }
+
     @NotNull
     @Override
     public HandlerList getHandlers() {