Adding new .docbook for KAddressBook, draft version

Summary:
I have written the first two chapters of documentation for KAddressBook, and I'm asking for feedback

BUG: 409998

Test Plan: ? I'm new, so I don't know.

Reviewers: #documentation, #kde_pim, yurchor

Reviewed By: yurchor

Subscribers: ltoscano, mlaurent, yurchor, lueck, ognarb, kde-pim, kde-doc-english

Tags: #kde_pim, #documentation

Differential Revision: https://phabricator.kde.org/D22799