Import objects from serialized format

[BernieWhite]

Several modern CLI tools provide the option to export objects/ results in a serialized format for down stream processing.

PSRule should be able to processing these objects on the fly for common format such as YAML and JSON.

For example:

# Validate service objects
Invoke-PSRule -InputObject (kubectl get services -o yaml | Out-String) -Format Yaml;

Added support for:

• [x] YAML
• [x] JSON

[BernieWhite]

Specifically for kubectl -o yaml objects are returned nested under the items property. A way to get nested objects within a object path is required to do this natively.

This will be raised as a separate issue.