Can't define `url` with `embedded` or `command` for manifest schema

[michaeltlombardi]

Prerequisites

• [X] Write a descriptive title.
• [X] Make sure you are able to repro it on the latest version
• [X] Search the existing issues.

Steps to reproduce

While updating the resource manifest for Microsoft/OSInfo in #168, I had to remove the schema.url property from the manifest for tests to pass - my understanding was that the schema url was strongly suggested for resources that define schema.command, but still usable for schema.embedded.

Double-checking the type definition:

https://github.com/PowerShell/DSC/blob/5a1f8b582edfbe8a040195baa7ff4bdb7231addd/dsc_lib/src/dscresources/resource_manifest.rs#L41-L43

https://github.com/PowerShell/DSC/blob/5a1f8b582edfbe8a040195baa7ff4bdb7231addd/dsc_lib/src/dscresources/resource_manifest.rs#L56-L67

It looks like you have to choose between the three options. You can define the value in the manifest as embedded or command or url, but not embedded and url or command and url, which contradicts prior conversations about using url and command together.

Expected behavior

The following manifest snippets are valid:

{
    "schema": {
        "embedded": {
            // schema definition
        }
    }
}


```jsonc
{
    "schema": {
        "command": {
            // schema command definition
        }
    }
}

{
    "schema": {
        "url": "https://schemas.tailspintoys.com/tstoy.json"
    }
}

{
    "schema": {
        "embedded": {
            // schema definition
        },
        "url": "https://schemas.tailspintoys.com/tstoy.json"
    }
}

{
    "schema": {
        "command": {
            // schema command definition
        },
        "url": "https://schemas.tailspintoys.com/tstoy.json"
    }
}

Actual behavior

The following snippets are valid:

{
    "schema": {
        "embedded": {
            // schema definition
        }
    }
}

{
    "schema": {
        "command": {
            // schema command definition
        }
    }
}

{
    "schema": {
        "url": "https://schemas.tailspintoys.com/tstoy.json"
    }
}

The following snippets are invalid:

{
    "schema": {
        "embedded": {
            // schema definition
        },
        "url": "https://schemas.tailspintoys.com/tstoy.json"
    }
}

{
    "schema": {
        "command": {
            // schema command definition
        },
        "url": "https://schemas.tailspintoys.com/tstoy.json"
    }
}

Error details

No response

Environment data

Name                           Value
----                           -----
PSVersion                      7.3.6
PSEdition                      Core
GitCommitId                    7.3.6
OS                             Microsoft Windows 10.0.22621
Platform                       Win32NT
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0…}
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1
WSManStackVersion              3.0

Version

Latest build from main

Visuals

No response