Fix headless options parsing issue

[dogancanbakir]

This PR fixes the -headless-options parsing issue. Closes #560.

go run main.go -hl -headless  -show-browser -ho '--load-extension=extensions/aeehekhncjhhmchjolinnihgdpapmljk,extensions/ogdlpmhglpejoiomcodnpjnfgcpmgale,--disable-gpu,--dummy=qwe,asd' -noi -u https://target

[Mzack9999]

I think this will have issues with paths containing -- for example with args like:

--a=a/b,c/d--z--n--m/a,--c=k,--h

What about changing the parsing function with original type to something like this keeping the previous type goflags.StringSlice:

func (options *Options) ParseHeadlessOptionalArguments() map[string]string {
	var (
		lastKey           string
		optionalArguments = make(map[string]string)
	)
	for _, v := range options.HeadlessOptionalArguments {
		if argParts := strings.SplitN(v, "=", 2); len(argParts) >= 2 {
			key := strings.TrimSpace(argParts[0])
			value := strings.TrimSpace(argParts[1])
			if key != "" && value != "" {
				optionalArguments[key] = value
				lastKey = key
			}
		} else if !strings.HasPrefix(v, "--") {
			optionalArguments[lastKey] += "," + v
		} else {
			optionalArguments[v] = ""
		}
	}
	return optionalArguments
}

[Mzack9999]

lgtm!

output of log.Fatalf("%+v", options.Options.ParseHeadlessOptionalArguments())

$ go run main.go -hl -headless  -show-browser -ho '--load-extension=extensions/aeehekhncjhhmchjolinnihgdpapmljk,extensions/ogdlpmhglpejoiomcodnpjnfgcpmgale,--disable-gpu,--dummy=qwe,asd' -noi -u https://target
...
2023/08/25 15:16:59 map[--disable-gpu: --dummy:qwe,asd --load-extension:extensions/aeehekhncjhhmchjolinnihgdpapmljk,extensions/ogdlpmhglpejoiomcodnpjnfgcpmgale]