first draft for auto-approval specification

[denelon]

Checklist for Pull Requests

• Have you signed the Contributor License Agreement?
• Is there a linked Issue?

Manifests

• Have you checked that there aren't other open pull requests for the same manifest update/change?
• This PR only modifies one (1) manifest
• Have you validated your manifest locally with winget validate --manifest <path>?
• Have you tested your manifest locally with winget install --manifest <path>?
• Does your manifest conform to the 1.6 schema?

Note: <path> is the directory's name containing the manifest you're submitting.

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