Add advice / documentation in readme on using cookies

[olearycrew]

Please describe your feature request:

We need to be clear about the expected format of using a cookie in headless mode. I believe it is:

katana -u "https://hackerone.com" -H 'cookie: ab={"x:{y}"}'

But we should be more clear about what the format is and what the parser expects.

[leveryd]

What this mean?

[Mzack9999]

@olearycrew cookies use the standard format defined by RFC. There is no expected format besides the one required by the specific web app being crawled. @dogancanbakir, can you check if the docs need to be extended with examples of authenticated crawling?

[dogancanbakir]

@Mzack9999 @olearycrew While it's indeed helpful to have as much detail and clarity in our documentation as possible, adding a specific section for using cookies in the README may not be necessary in this case. Since this usage is common across many tools and not unique to katana, it is typically expected that users would be familiar with it or can easily find information on it.

[olearycrew]

I think we’ve seen this question many times in the community so I think we should consider documenting an example somewhere.

Perhaps @pd-jason and Carrie can weigh in here

[dogancanbakir]

we’ve seen this question many times in the community

Then let's address it, on it!

[Sim4n6]

Sorry to intervein, I asked that question on Discord if I remember.
It was not an ephemeral question, but rather something that requires a documentation update.

[ehsandeep]

more info added at https://github.com/projectdiscovery/katana#authenticated-crawling