Fix hex colors not working in chat (#6114)

Need to explicitly enable them in our LegacyComponentSerializer.

Author: JRoy

Essentials/src/main/java/com/earth2me/essentials/utils/AdventureUtil.java

@@ -22,6 +22,7 @@ public final class AdventureUtil {
         final LegacyComponentSerializer.Builder builder = LegacyComponentSerializer.builder()
                 .flattener(ComponentFlattener.basic())
                 .extractUrls(AbstractChatEvent.URL_PATTERN)
+                .hexColors()
                 .useUnusualXRepeatedCharacterHexFormat();
         if (VersionUtil.getServerBukkitVersion().isHigherThanOrEqualTo(VersionUtil.v1_16_1_R01)) {
             builder.hexColors();

providers/PaperProvider/src/main/java/net/ess3/provider/providers/PaperChatListenerProvider.java

@@ -27,7 +27,9 @@ public PaperChatListenerProvider(final boolean formatParsing) {
         this.serializer = LegacyComponentSerializer.builder()
                 .flattener(ComponentFlattener.basic())
                 .extractUrls(AbstractChatEvent.URL_PATTERN)
-                .useUnusualXRepeatedCharacterHexFormat().build();
+                .useUnusualXRepeatedCharacterHexFormat()
+                .hexColors()
+                .build();
     }
 
     public void onChatLowest(final AbstractChatEvent event) {