Added mail forward operations#57

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daanwa wants to merge 4 commits intoroaldnefs:mainfrom

Commits on Mar 22, 2023

Added mock calls for the mail forward endpoints
Daan Wagenaar
committed
Added the MailForward class and MailForwardService. Scaled these under domain as all mail forward related operations require a domain
Daan Wagenaar
committed
Added readme for mail forwards
Daan Wagenaar
committed
Added tests for the mail forwards
Daan Wagenaar
committed