Allow recommendations in blocks

[JoviDeCroock]

What are you adding in this PR?

This adds support for leveraging the recommendations global in blocks/, currently we allow it in sections but not in blocks. We've been using this in a block and it's been great so thought I'd add support into the theme check.

Before you deploy

• This PR includes a new checks or changes the configuration of a check
  • I included a minor bump changeset
  • It's in the allChecks array in src/checks/index.ts
  • I ran yarn build and committed the updated configuration files
    • If applicable, I've updated the theme-app-extension.yml config
  • I've made a PR to update the shopify.dev theme check docs if applicable (link PR here).

[charlespwd]

To TypeSystem too for completion/hover support?

[mxstbr]

I'm assuming this exists; if so, making theme check aware of that 👍