Analysis of needs metrics

[danwos]

Idea by @StephanKuempel

We already have .. needreport to document the current configuration.

But it would be also good to document various aspects of the current need-data (dict).

Ideas, what shall be documented (only the numbers, no list of needs):

• Needs amount
• Used need types
• Needs per type
• Used options
• Used options per type (Req --> author, status, Spec --> tags)
• Used link types
• Amount of needs per link types
• Target need type of links per link type (E.g. validates --> Req, Test, block --> Spec)

This analysis can be also done on a needs.json file.

Example:

.. needreport::
   :usage: