Dependency config effectiveness metric

[realvizu]

Calculate a metric that shows the effectiveness of the current dependency config.

DepConfigEffectiveness = (# of actual type-level dependencies in code) / (# of all allowed type-level dependencies)

The extreme cases would be:

• 1 -> means the tightest dependency config that allows only the actually used dependencies.
• Close to 0 -> means a very loose dependency config that allows everything so does not have much effect.

Performance concern: calculating the # of all allowed type-level dependencies would require counting all types in all namespaces in all referenced assemblies which sounds extreme.