EPIC: Implement all host capabilities on the SDK, create library

[viccuad]

We want to have this Javascript SDK as a high quality TypeScript library that is a first citizen in the Kubewarden ecosystem. @esosaoh will be mainly working on this task.

For that, we need to do the following:

• Have a Continuous integration GitHub job that runs on each PR and gates PRs to this repo Add Continous Integration to the project #121
• Implement the host capabilities. The host capabilities such provide caching as needed, and logging.
  These are, as listed in our reference docs:
  • Sigstore capabilities, v2/verify (we can skip v1/verify). This includes the following inputs:
    • SigstorePubKeyVerify
    • SigstoreKeylessVerify
    • SigstoreKeylessPrefixVerify
    • SigstoreGithubActionsVerify
    • SigstoreCertificateVerify
      Implement Sigstore host capabilities #201
  • OCI capabilities. This includes:
    • v1/manifest_digest Feature request: Implement v1/manifest_digest OCI host capability #91
    • v1/oci_manifest Implement v1/oci_manifest OCI host capability #123
    • v1/oci_manifest_config Implement v1/oci_manifest_config OCI host capability #124
  • Network capabilities (v1/dns_lookup_host). Was done as initial POC.
  • Cryptographic capabilities:
    • v1/is_certificate_trusted Implement Crypto Host Capability #189
  • Kubernetes capabilities. This includes:
    • list_resources_all
    • list_resources_by_namespace
    • get_resource Feature request: Implement kubernetes/get_resource capability #135
    • can_i (added in the near future, see here) Host capability to check service account permissions #116
• Refactor code as needed to:
  • Have a Typescript library and javy plugin that can be imported and used when creating a policy written in Typescript/Javascript. Export the host capabilities.
  • Move demo policy to its own repo. Remove demo policy from the SDK directory #122
  • Implement caching for the needed capabilities Add caching to get_resource host capability #120
• (optional) Document the library functions with JSDoc and publish them somewhere (e.g: with gh-pages). Generate and publish JSDoc in gh-pages #165
• Document library usage with a tutorial docs: Add tutorial for policy-sdk-js #190
• Have a Continuous Delivery GitHub job that runs on each git tag pushed to the repo, and makes a GH release Add Continous Delivery, do first alpha release #148
• Blog post on kubewarden.io/blog !
  • Announce post (in Slack, Mastodon, Bluesky).
• Create a policy template to consume lib from npm: Create policy-template-js policy repo to test the consumption of the library from npmjs #153
  • If needed, create a policy demo
• (optional) Add reusable GH reusable workflows to publish js policies into github.com/kubewarden/github-actions

For each host capability, we should provide e2e tests, unit tests, cache if needed (see other SDKs), logging, JSDocs.

• Close Allow policies to be written using JavaScript community#37! 🚀