feat: ignored field in llmo config

[jjenscodee]

Added ignored schema to LlmoConfig for persisting GSC-suggested prompts that customers have chosen to hide.

Schema structure:

ignored: {
  prompts: {
    "<uuid>": {
      prompt: "string",      // required
      region: "US",          // required
      source: "gsc",         // required (or any string)
      updatedBy: "string",   // optional
      updatedAt: "string"    // optional
    }
  }
}

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• make sure to link the related issues in this description
• when merging / squashing, make sure the fixed issue references are visible in the commits, for easy compilation of release notes

Related Issues

https://jira.corp.adobe.com/browse/LLMO-3005

Thanks for contributing!

[github-actions]

This PR will trigger a minor release when merged.

[solaris007]

🎉 This PR is included in version @adobe/spacecat-shared-utils-v1.93.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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