[BUG] Union does not perform deep merge or keep property order

[BernieWhite]

Existing rule

No response

Description of the issue

When using union:

• Nested properties of object should also be merged instead of replaced.
• Property order should preserve.

Error messages

No response

Reproduction

var firstObject = {
  property: {
    one: 'a'
    two: 'b'
    three: 'c1'
  }
  nestedArray: [
    1
    2
  ]
}
var secondObject = {
  property: {
    three: 'c2'
    four: 'd'
    five: 'e'
  }
  nestedArray: [
    3
    4
  ]
}
output objectOutput object = union(firstObject, secondObject)

Should return the output:

{"property":{"one":"a","two":"b","three":"c2","four":"d","five":"e"},"nestedArray":[3,4]}

Version of PSRule

2.9.0

Version of PSRule for Azure

1.26.0

Additional context

• https://learn.microsoft.com/azure/azure-resource-manager/bicep/bicep-functions-object#union