Fix i18n String API

In 1.13 the method previously used now returns translatable keys.
`block.minecraft.cobblestone` instead of `Cobblestone`

We just need to make sure we're translating those keys.

Spigot-Server-Patches/Implement-getI18NDisplayName.patch

@@ -7,8 +7,25 @@ Gets the Display name as seen in the Client.
 Currently the server only supports the English language. To override this,
 You must replace the language file embedded in the server jar.
 
+diff --git a/src/main/java/net/minecraft/server/LocaleLanguage.java b/src/main/java/net/minecraft/server/LocaleLanguage.java
+index 4361b2cee..f81887c66 100644
+--- a/src/main/java/net/minecraft/server/LocaleLanguage.java
++++ b/src/main/java/net/minecraft/server/LocaleLanguage.java
+@@ -0,0 +0,0 @@ public class LocaleLanguage {
+ 
+     }
+ 
++    public static LocaleLanguage getInstance() { return a(); } // Paper - OBFHELPER
+     public static LocaleLanguage a() {
+         return LocaleLanguage.c;
+     }
+ 
++    public synchronized String translateKey(String key) { return a(key); } // Paper - OBFHELPER
+     public synchronized String a(String s) {
+         return this.c(s);
+     }
 diff --git a/src/main/java/org/bukkit/craftbukkit/inventory/CraftItemFactory.java b/src/main/java/org/bukkit/craftbukkit/inventory/CraftItemFactory.java
-index e98e1ed72..1df2b463a 100644
+index e98e1ed72..35eb3181d 100644
 --- a/src/main/java/org/bukkit/craftbukkit/inventory/CraftItemFactory.java
 +++ b/src/main/java/org/bukkit/craftbukkit/inventory/CraftItemFactory.java
 @@ -0,0 +0,0 @@ public final class CraftItemFactory implements ItemFactory {
@@ -26,7 +43,7 @@ index e98e1ed72..1df2b463a 100644
 +            nms = CraftItemStack.asNMSCopy(item);
 +        }
 +
-+        return nms != null ? nms.getItem().getName() : null;
++        return nms != null ? net.minecraft.server.LocaleLanguage.getInstance().translateKey(nms.getItem().getName()) : null;
 +    }
      // Paper end
  }