Enhance state reporting for complex resources #1659

Summary of the new feature / enhancement

As a system administrator configuring infrastructure with DSC,
I want to know which sub-properties and array items are out-of-state or were changed,
So that I don't have to manually compare complex objects and array items manually.

Currently, the DSC engine can only report when top-level properties are out of state (for test operations) or changed (for set operations). For resources with array and object properties, this requires the user to carefully review the desired/actual or before/after state for the property to understand which subproperty or array item triggered the reporting for the top-level field.

For example, consider the following output snippet for the result of a test operation:

desiredState:
  foo:
    bar: true
    baz: false
  fruit: ['apple', 'banana']
actualState:
  foo:
    bar: false
    baz: false
  fruit: ['apple']
differingProperties: ['foo', 'fruit']

This problem is amplified for resources with more deeply nested objects and arrays.

Proposed technical implementation details (optional)

No response