Fix Nullability Annotations for PrepareItemEnchantEvent (#7681)

patches/api/Fix-Spigot-annotation-mistakes.patch

@@ -106,6 +106,15 @@ diff --git a/src/main/java/org/bukkit/event/enchantment/PrepareItemEnchantEvent.
 index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
 --- a/src/main/java/org/bukkit/event/enchantment/PrepareItemEnchantEvent.java
 +++ b/src/main/java/org/bukkit/event/enchantment/PrepareItemEnchantEvent.java
+@@ -0,0 +0,0 @@ public class PrepareItemEnchantEvent extends InventoryEvent implements Cancellab
+     private boolean cancelled;
+     private final Player enchanter;
+ 
+-    public PrepareItemEnchantEvent(@NotNull final Player enchanter, @NotNull InventoryView view, @NotNull final Block table, @NotNull final ItemStack item, @NotNull final EnchantmentOffer[] offers, final int bonus) {
++    public PrepareItemEnchantEvent(@NotNull final Player enchanter, @NotNull InventoryView view, @NotNull final Block table, @NotNull final ItemStack item, @org.jetbrains.annotations.Nullable final EnchantmentOffer @NotNull [] offers, final int bonus) { // Paper - offers can contain null values
+         super(view);
+         this.enchanter = enchanter;
+         this.table = table;
 @@ -0,0 +0,0 @@ public class PrepareItemEnchantEvent extends InventoryEvent implements Cancellab
       * @return experience level costs offered
       * @deprecated Use {@link #getOffers()} instead of this method
@@ -114,6 +123,16 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
      @NotNull
      public int[] getExpLevelCostsOffered() {
          int[] levelOffers = new int[offers.length];
+@@ -0,0 +0,0 @@ public class PrepareItemEnchantEvent extends InventoryEvent implements Cancellab
+      *
+      * @return list of available enchantment offers
+      */
+-    @NotNull
+-    public EnchantmentOffer[] getOffers() {
++    public @org.jetbrains.annotations.Nullable EnchantmentOffer @NotNull [] getOffers() { // Paper offers can contain null values
+         return offers;
+     }
+ 
 diff --git a/src/main/java/org/bukkit/inventory/CraftingInventory.java b/src/main/java/org/bukkit/inventory/CraftingInventory.java
 index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
 --- a/src/main/java/org/bukkit/inventory/CraftingInventory.java