[Feature] Add new config to metric definition to specify positive direction

[siljamardla]

Is this your first time submitting a feature request?

• I have read the expectations for open source contributors
• I have searched the existing issues, and I could not find an existing issue for this feature
• I am requesting a straightforward extension of existing metricflow functionality, rather than a Big Idea better suited to a discussion

Describe the feature

We use metric definitions in different contexts. For many of them, a common requirement is to help the user understand what's good and what's bad. e.g. for a revenue metric good is going up, bad is going down while for a cost metric good is going down while bad is going up.
It would be good to specify the positive direction of a metric right in the definition of a metric. This could then be picked up and used in reporting, experimentation etc.

Describe alternatives you've considered

Specifying the direction on consumer side (possibly in multiple places, adding overhead).

Who will this benefit?

No response

Are you interested in contributing this feature?

No response

Anything else?

No response