Add contact

[wonddok]

Is the feature you are looking for already implemented in the library?

• I have reviewed the implemented features.

Is your "solution" already implemented in an opened pull request?

• I have reviewed the existing pull requests.

Is your feature request related to a problem? Please describe.

I see this feature is already available on the web, can it be added now? #195

Describe the solution you'd like.

I see this feature is already available on the web, can it be added now? #195

Describe an alternate solution if you have one.

No response

Additional Context

No response

[BenyFilho]

As was said before, WhatsApp Web can't add contacts, because only cellphones have contacts.