Change ComponentUtil#jsonToLegacy validation to match Vanilla

MC 1.14 validates both lore and display name properly when reading it, this doesn't matter for ViaVersion where the server doesn't send a json and we build it (and the client never sends invalid data to us). But it is important for ViaBackwards to handle invalid sent json properly like MC does.

common/src/main/java/com/viaversion/viaversion/protocols/v1_13_2to1_14/rewriter/ItemPacketRewriter1_14.java

@@ -260,7 +260,7 @@ public class ItemPacketRewriter1_14 extends ItemRewriter<ClientboundPackets1_13,
 
         if (item.tag() == null) return item;
 
-        // Display Name now uses JSON
+        // Lore now uses JSON
         CompoundTag display = item.tag().getCompoundTag("display");
         if (display != null) {
             ListTag<StringTag> lore = display.getListTag("Lore", StringTag.class);

common/src/main/java/com/viaversion/viaversion/util/ComponentUtil.java

@@ -19,6 +19,7 @@ package com.viaversion.viaversion.util;
 
 import com.google.gson.JsonElement;
 import com.google.gson.JsonObject;
+import com.google.gson.JsonParseException;
 import com.viaversion.nbt.tag.CompoundTag;
 import com.viaversion.nbt.tag.StringTag;
 import com.viaversion.nbt.tag.Tag;
@@ -165,8 +166,14 @@ public final class ComponentUtil {
         return SerializerVersion.V1_12.toString(component);
     }
 
-    public static String jsonToLegacy(final String value) {
-        return TextComponentSerializer.V1_12.deserializeReader(value).asLegacyFormatString();
+    public static @Nullable String jsonToLegacy(final String value) {
+        try {
+            final ATextComponent component = TextComponentSerializer.V1_12.deserializeReader(value);
+            if (component == null) return null;
+            return component.asLegacyFormatString();
+        } catch (final JsonParseException e) {
+            return null;
+        }
     }
 
     public static String jsonToLegacy(final JsonElement value) {