RHDH plugin for fetching and extracting OCI skills images build via 'skillctl' CLI

Reference JIRA: https://redhat.atlassian.net/browse/RHIDP-16943

Description

build a typescript plugin that via code can fetch and process OCI skills images built by https://github.com/redhat-et/skillimageConnect your Github account

As a starting reference, see if the nodejs based image client at https://github.com/oras-project/rust-oci-client-nodeConnect your Github account can serve as either an imported library or a reference implementation that can be copy/pasted into the new RHDH plugin build

Acceptance Criteria

• running the plugin via the ‘yarn dev’ or ‘yarn start’ command in your IDE, create a plugin that takes image refs as configuration, and fetches the configured images

• confirm if the image meets the format specified by https://github.com/redhat-et/skillimage

  • one such image is quay.io/gabemontero/hello-world-skill:1.0.0-draft
  • golang code from skillimage that inspects images is at https://github.com/redhat-et/skillimage/blob/main/pkg/oci/inspect.go
  • typescript code that pulls images is shown at https://github.com/oras-project/rust-oci-client-node#usage

• extract the skillimage.yaml and SKILLS.md files onto local storage,

  • see https://github.com/redhat-developer/rhdh-plugins/blob/main/workspaces/ai-integrations/plugins/catalog-techdoc-url-reader-backend/src/plugin.ts#L40 and https://github.com/redhat-developer/rhdh-plugins/blob/main/workspaces/ai-integrations/plugins/catalog-techdoc-url-reader-backend/src/plugin.ts#L68-L99 for examples of how to store files locally form a RHDH plugin

Start with the catalog-techdoc-url-reader-backend plugin.ts examples for local storage, then compare skillimage/pkg/oci/inspect.go with the rust-oci-client-node usage reference. Build the RHDH plugin around configured image references and verify it with quay.io/gabemontero/hello-world-skill:1.0.0-draft. Done means the plugin runs via yarn dev or yarn start, validates the image format, and stores skillimage.yaml and SKILLS.md locally.