Add initial 1.0 release package metadata

[Copilot]

This repository only contained the project README, so the first release was missing the package metadata needed to publish/version the extension. This change introduces the minimal release manifest for version 1.0.0.

• Release packaging

  • Add plugin.nuspec at the repository root
  • Define the package identity as com.castsoftware.uc.goldenrules
  • Set the initial release version to 1.0.0

• Repository metadata

  • Populate title, authors, owner, project URL, description, and tags
  • Keep the manifest intentionally minimal with an empty <files /> section

<metadata>
  <id>com.castsoftware.uc.goldenrules</id>
  <version>1.0.0</version>
  <title>Golden Rules custom extension</title>
</metadata>

Original prompt

First release