[Catalog] Enhancing “add catalog” workflow to auto-generate “artifacthub-pkg”

[dusdjhyeon]

Descriptions

• When catalog is added/updated the content of directory should be created/updated.
• We need a small golang program which gets invoked as part of the add-catalog github workflow.
  1. use the Catalog API to get all your catalog items
  2. repeat 1 to generate the corresponding markdown file and write it to the correct location
  3. call meshkit to get the artifacthub-pkg
  4. create a folder name based on its ID
  5. create both design files and artifacthub-pkg files in that directory

Expected Behavior

• By autogenerating an artifacthub-pkg.yml, Catalogs can be automatically listed inside artifacthub.

Contributor Resources

The meshery.io website uses Jekyll and GitHub Pages. Site content is found under the master branch.

• See the Contributing to Meshery.io Website section of the readme.md and other contributing instructions, too.
• See Meshery site designs in this Figma designfile. Fill-in the Layer5 Community Member Form and join the Layer5 Community Slack for access.

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[leecalcote]

Tagging @ctcarrier. It'd be great to link this issue to its parent in meshery/meshery.