[Feature Request] Allow optional control over vertical and horizontal display

[a2ush]

Request

The current implementation defaults to horizontal, so only horizontal views are generated.

diagram-as-code/internal/types/group.go

Line 55 in 601056c

gr.direction = "horizontal"

It's better to be able to switch the display with an option.

Example

$ awsdac <input CloudFormation template> --cfn-template --vertical