[UX] Report Time Format should be configurable

[roma-glushko]

Description

Currently, Tango generates reports without the ability to specify output time format. I'm aware at least about 2 time formats that would be nice to have:

• EU format: Sep 11th, 2019 (month-first)
• US format: 11th September 2019 (day-first)

Also, it would be nice to have the ability to specify a custom time format in case it's needed.

Expected behavior

There is a way to specify two defined templates for the time (EU/US formats) or pass completely custom format based on Golang possibilities:

• https://programming.guide/go/format-parse-string-time-date-example.html

Benefits

• reduce the frustration of users that would read reports