Adds velocity check util

eco-core/core-plugin/src/main/java/com/willfp/ecoenchants/enchantments/util/VelocityChecks.java

@@ -0,0 +1,22 @@
+package com.willfp.ecoenchants.enchantments.util;
+
+import org.bukkit.util.Vector;
+
+public class VelocityChecks {
+    /**
+     * Checks to see if the velocity is unsafe. This is taken from Papers 0054-Add-velocity-warnings.patch
+     * @param vel
+     * @return
+     */
+    public static boolean isUnsafeVelocity(Vector vel) {
+        final double x = vel.getX();
+        final double y = vel.getY();
+        final double z = vel.getZ();
+
+        if (x > 4 || x < -4 || y > 4 || y < -4 || z > 4 || z < -4) {
+            return true;
+        }
+
+        return false;
+    }
+}