Added PlayerToggleSprint event and sprinting related API.

By: Rigby <rigby@onarandombox.com>

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

@@ -150,6 +150,13 @@ public class PlayerListener implements Listener {
      */
     public void onPlayerToggleSneak(PlayerToggleSneakEvent event) {}
 
+    /**
+     * Called when a player toggles sprint mode
+     *
+     * @param event Relevant event details
+     */
+    public void onPlayerToggleSprint(PlayerToggleSprintEvent event) {}
+
     /**
      * Called when a player fills a bucket
      *
@@ -191,10 +198,10 @@ public class PlayerListener implements Listener {
      * @param event Relevant event details
      */
     public void onPlayerFish(PlayerFishEvent event) {}
-    
+
     /**
      * Called when a player's game mode is changed
-     * 
+     *
      * @param event Relevant event details
      */
     public void onPlayerGameModeChange(PlayerGameModeChangeEvent event) {}

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

@@ -0,0 +1,34 @@
+package org.bukkit.event.player;
+
+import org.bukkit.entity.Player;
+import org.bukkit.event.Cancellable;
+
+/**
+ * Called when a player toggles their sprinting state
+ */
+public class PlayerToggleSprintEvent extends PlayerEvent implements Cancellable {
+    private boolean isSprinting;
+    private boolean cancel = false;
+
+    public PlayerToggleSprintEvent(final Player player, boolean isSprinting) {
+        super(Type.PLAYER_TOGGLE_SPRINT, player);
+        this.isSprinting = isSprinting;
+    }
+
+    /**
+     * Gets whether the player is now sprinting or not.
+     *
+     * @return sprinting state
+     */
+    public boolean isSprinting() {
+        return isSprinting;
+    }
+
+    public boolean isCancelled() {
+        return cancel;
+    }
+
+    public void setCancelled(boolean cancel) {
+        this.cancel = cancel;
+    }
+}