Base: Add icon for palette files

Author: https://github.com/metmo
Commit: https://github.com/SerenityOS/serenity/commit/ae5f5a4d50f
Pull-request: https://github.com/SerenityOS/serenity/pull/11872
Reviewed-by: https://github.com/linusg ✅

Base/etc/FileIconProvider.ini

@@ -12,6 +12,7 @@ library=*.so,*.so.*,*.a
 markdown=*.md
 music=*.midi
 object=*.o,*.obj
+palette=*.palette
 pdf=*.pdf
 python=*.py
 sound=*.wav,*.flac