Preserve dash-prefixed fallback arguments

[tig]

💡 Codex Review

cli/src/Terminal.Gui.Cli/CliHost.cs

Lines 92 to 93 in 709bd1d

	string[] adjusted = [_options.DefaultCommand!, .. args];
	ArgParser.ParseResult parse = _parser.Parse (adjusted, defaultCmd);

Preserve dash-prefixed fallback arguments

When DefaultCommand is used because the original args fail to parse, this reparse still treats the caller's tokens as normal options for the default command. For a default command that accepts positional args, inputs like app --literal or app Alice --suffix now return Unknown option unless those dash-prefixed values happen to be declared options, even though the new DefaultCommand contract says unrecognized options are retried as args to the default command. The fallback path needs a way to pass the original tokens through as positional arguments or otherwise stop option parsing for unknown tokens.

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Originally posted by @chatgpt-codex-connector[bot] in #28 (comment)