Add helpers for left/right hand to Action (#6517)

* Add helpers for left/right hand to Action

* Diff starts here technically

patches/api/Add-helpers-for-left-right-hand-to-Action.patch

@@ -0,0 +1,37 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Madeline Miller <mnmiller1@me.com>
+Date: Sun, 29 Aug 2021 16:22:46 +1000
+Subject: [PATCH] Add helpers for left/right hand to Action
+
+
+diff --git a/src/main/java/org/bukkit/event/block/Action.java b/src/main/java/org/bukkit/event/block/Action.java
+index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+--- a/src/main/java/org/bukkit/event/block/Action.java
++++ b/src/main/java/org/bukkit/event/block/Action.java
+@@ -0,0 +0,0 @@ public enum Action {
+      * <li>Triggering tripwire
+      * </ul>
+      */
+-    PHYSICAL,
++    // Paper start
++    PHYSICAL;
++
++    /**
++     * Gets whether this action is a result of a left-hand click.
++     *
++     * @return Whether it's a left-hand click
++     */
++    public boolean isLeftHand() {
++        return this == LEFT_CLICK_AIR || this == LEFT_CLICK_BLOCK;
++    }
++
++    /**
++     * Gets whether this action is a result of a right-hand click.
++     *
++     * @return Whether it's a right-hand click
++     */
++    public boolean isRightHand() {
++        return this == RIGHT_CLICK_AIR || this == RIGHT_CLICK_BLOCK;
++    }
++    // Paper end
+ }