Is your feature request related to a problem? Please describe.
I'd love to start using Weaver as part of my CI workflows in a couple of repositories. Unfortunately, not everybody knows Rust and how to build Rust applications. Running containers in CI also isn't the best experience since we need to spin up things like QEMU and it makes the whole workflow slower.

Describe the solution you'd like

It would be awesome if Weaver could be offered as a standalone GitHub Action. We probably don't need all the commands available, but generate and validate would be awesome already.

Some ideas:

    steps:
      - uses: opentelemetry/weaver
        with:
          command: validate
          registry: xxx
     - uses: opentelemetry/weaver
        with:
          command: generate
          registry: xxx

or

    steps:
      - uses: opentelemetry/weaver-validate
        with:
          registry: xxx
     - uses: opentelemetry/weaver-generate
        with:
          registry: xxx