Add itemName components (Resolves #10467) (#10471)

* Add itemName components (Resolves ##10467)

* improve javadocs and formatting

* rebased

---------

Co-authored-by: Jake Potrebic <jake.m.potrebic@gmail.com>

patches/api/Adventure.patch

@@ -4643,6 +4643,59 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +    @Deprecated // Paper
      void setDisplayName(@Nullable String name);
  
+     /**
+@@ -0,0 +0,0 @@ public interface ItemMeta extends Cloneable, ConfigurationSerializable, Persiste
+      */
+     boolean hasItemName();
+ 
++    // Paper start
++    /**
++     * Gets the item name component that is set.
++     * <br>
++     * Item name differs from display name in that it is cannot be edited by an
++     * anvil, is not styled with italics, and does not show labels.
++     * <p>
++     * Plugins should check that {@link #hasItemName()} returns <code>true</code> before
++     * calling this method.
++     *
++     * @return the item name that is set
++     * @see #hasItemName()
++     */
++    @org.jetbrains.annotations.NotNull
++    Component itemName();
++
++    /**
++     * Sets the item name.
++     * <br>
++     * Item name differs from display name in that it is cannot be edited by an
++     * anvil, is not styled with italics, and does not show labels.
++     *
++     * @param name the name to set, null to remove it
++     */
++    void itemName(@Nullable final Component name);
++    // Paper end
+     /**
+      * Gets the item name that is set.
+      * <br>
+@@ -0,0 +0,0 @@ public interface ItemMeta extends Cloneable, ConfigurationSerializable, Persiste
+      * calling this method.
+      *
+      * @return the item name that is set
++     * @deprecated in favour of {@link #itemName()}
+      */
++    @Deprecated // Paper
+     @NotNull
+     String getItemName();
+ 
+@@ -0,0 +0,0 @@ public interface ItemMeta extends Cloneable, ConfigurationSerializable, Persiste
+      * anvil, is not styled with italics, and does not show labels.
+      *
+      * @param name the name to set
++     * @deprecated in favour of {@link #itemName(Component)}
+      */
++    @Deprecated // Paper
+     void setItemName(@Nullable String name);
+ 
      /**
 @@ -0,0 +0,0 @@ public interface ItemMeta extends Cloneable, ConfigurationSerializable, Persiste
       */