Extend schema manifest to include kind

[michaeltlombardi]

Summary of the new feature / enhancement

As a resource author and integrating vendor, I want to be able to quickly distinguish between standard command-based DSC Resources, resource groups, and resource providers without having to inspect the full manifest in detail

Proposed technical implementation details (optional)

Add a kind property to the DSC Resource manifest that supports three enum values:

• standard - a "normal" command-based DSC Resource, not a group or provider. This is the default value if the key isn't specified.
• group - a resource group, always has nested resources as properties under the resources keyword. May have other properties that influence how the resource group behaves. When kind is set to group, the validate property is required.
• provider - a resource provider, a special resource group that enables the use of non-command-based DSC Resources. When kind is set to provider, the validate and provider properties are required.

After kind is included in the resource manifest, the dsc resource list command should surface the resource kind in the default output and at the top-level.

[SteveL-MSFT]

Alternate proposal, in the resource.json, have the kind be the property name instead of the property value:

So instead of what we have today:

{
    "$schema": "https://raw.githubusercontent.com/PowerShell/DSC/main/schemas/2023/08/bundled/resource/manifest.json",
    "type": "DSC/PowerShellGroup",
    "version": "0.1.0",
    "description": "Resource provider to classic DSC Powershell resources.",
    "tags": [
      "PowerShell"
    ],
    "provider": {
      "list": {
        "executable": "pwsh",
        "args": [
          "-NoLogo",
          "-NonInteractive",
          "-NoProfile",
          "-Command",
          "./powershellgroup.resource.ps1 List"
        ]
        },
      "config": "full"
    },
    "get": {
      "executable": "pwsh",
      "args": [
        "-NoLogo",
        "-NonInteractive",
        "-NoProfile",
        "-Command",
        "$Input | ./powershellgroup.resource.ps1 Get"
      ],
      "input": "stdin"
      },

This becomes:

{
    "$schema": "https://raw.githubusercontent.com/PowerShell/DSC/main/schemas/2023/08/bundled/resource/manifest.json",
    "type": "DSC/PowerShellGroup",
    "version": "0.1.0",
    "description": "Resource provider to classic DSC Powershell resources.",
    "tags": [
      "PowerShell"
    ],
    "provider": {
      "list": {
        "executable": "pwsh",
        "args": [
          "-NoLogo",
          "-NonInteractive",
          "-NoProfile",
          "-Command",
          "./powershellgroup.resource.ps1 List"
        ]
        },
      "config": "full",
      "get": {
        "executable": "pwsh",
        "args": [
          "-NoLogo",
          "-NonInteractive",
          "-NoProfile",
          "-Command",
          "$Input | ./powershellgroup.resource.ps1 Get"
        ],
        "input": "stdin"
        },
      },