better handle typos in jbang catalog

[maxandersen]

forgot to add a ',' in a json and I got this:

jbang catalog list jbanghub/eclipse
[jbang] [ERROR] Unable to download catalog: https://github.com/jbanghub/eclipse/blob/HEAD/jbang-catalog.json via null
[jbang] Run with --verbose for more details

not very informative. --verbose gives a bit more.

manderse@goldentiny s % jbang catalog list --verbose jbanghub/eclipse
[jbang] [0:189] jbang version 0.115.0
[jbang] [0:196] Reading catalog from /Users/manderse/.jbang/jbang-catalog.json
[jbang] [0:238] Using cached file /Users/manderse/.jbang/cache/urls/fa06f056bd9cf8e061116f81e22c41b4f34a625bf6ca06b134c9e2ef300246d3/jbang-catalog.json for remote https://raw.githubusercontent.com/jbanghub/jbang-catalog/HEAD/jbang-catalog.json
[jbang] [0:238] Reading catalog from https://github.com/jbanghub/jbang-catalog/blob/HEAD/jbang-catalog.json
[jbang] [0:239] Obtained catalog from https://github.com/jbanghub/jbang-catalog/blob/HEAD/jbang-catalog.json
[jbang] [0:240] Using cached file /Users/manderse/.jbang/cache/urls/0f56633befec550f5330066df1f5f47112bdc7a0ddfc957b627bf3fbde5fa0bc/jbang-catalog.json for remote https://raw.githubusercontent.com/jbanghub/eclipse/HEAD/jbang-catalog.json
[jbang] [0:240] Reading catalog from https://github.com/jbanghub/eclipse/blob/HEAD/jbang-catalog.json
[jbang] [0:242] [ERROR] Unable to download catalog: https://github.com/jbanghub/eclipse/blob/HEAD/jbang-catalog.json via null
dev.jbang.cli.ExitException: Unable to download catalog: https://github.com/jbanghub/eclipse/blob/HEAD/jbang-catalog.json via null
	at dev.jbang.catalog.Catalog.getByRef(Catalog.java:212)
	at dev.jbang.catalog.Catalog.getByName(Catalog.java:145)
	at dev.jbang.cli.CatalogList.doCall(Catalog.java:166)
	at dev.jbang.cli.BaseCommand.call(BaseCommand.java:145)
	at dev.jbang.cli.BaseCommand.call(BaseCommand.java:21)
	at picocli.CommandLine.executeUserObject(CommandLine.java:1953)
	at picocli.CommandLine.access$1300(CommandLine.java:145)
	at picocli.CommandLine$RunLast.executeUserObjectOfLastSubcommandWithSameParent(CommandLine.java:2358)
	at picocli.CommandLine$RunLast.handle(CommandLine.java:2352)
	at dev.jbang.cli.JBang$3.handle(JBang.java:148)
	at dev.jbang.cli.JBang$3.handle(JBang.java:143)
	at picocli.CommandLine$AbstractParseResultHandler.execute(CommandLine.java:2179)
	at picocli.CommandLine$RunLast.execute(CommandLine.java:2316)
	at picocli.CommandLine.execute(CommandLine.java:2078)
	at dev.jbang.Main.main(Main.java:14)
Caused by: com.google.gson.JsonSyntaxException: com.google.gson.stream.MalformedJsonException: Unterminated object at line 11 column 8 path $.aliases..description
	at com.google.gson.Gson.fromJson(Gson.java:1241)
	at com.google.gson.Gson.fromJson(Gson.java:1137)
	at com.google.gson.Gson.fromJson(Gson.java:1075)
	at dev.jbang.catalog.Catalog.read(Catalog.java:360)
	at dev.jbang.catalog.Catalog.read(Catalog.java:350)
	at dev.jbang.catalog.Catalog.get(Catalog.java:315)
	at dev.jbang.catalog.Catalog.getByRef(Catalog.java:190)
	... 14 more
Caused by: com.google.gson.stream.MalformedJsonException: Unterminated object at line 11 column 8 path $.aliases..description
	at com.google.gson.stream.JsonReader.syntaxError(JsonReader.java:1659)
	at com.google.gson.stream.JsonReader.doPeek(JsonReader.java:500)
	at com.google.gson.stream.JsonReader.hasNext(JsonReader.java:422)
	at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:387)
	at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.read(TypeAdapterRuntimeTypeWrapper.java:40)
	at com.google.gson.internal.bind.MapTypeAdapterFactory$Adapter.read(MapTypeAdapterFactory.java:186)
	at com.google.gson.internal.bind.MapTypeAdapterFactory$Adapter.read(MapTypeAdapterFactory.java:144)
	at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.readIntoField(ReflectiveTypeAdapterFactory.java:212)
	at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$FieldReflectionAdapter.readField(ReflectiveTypeAdapterFactory.java:433)
	at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:393)
	at com.google.gson.Gson.fromJson(Gson.java:1227)
	... 20 more
[jbang] [0:242] If you believe this a bug in jbang, open an issue at https://github.com/jbangdev/jbang/issues
manderse@goldentiny s %

should be some more informative and explain at least there was a parse error in document at