Related to #29
We should show which platforms a module is tested on.

We'd have to parse the presubmit.yml for a line like https://github.com/bazelbuild/bazel-central-registry/blob/main/modules/aspect_rules_js/1.15.1/presubmit.yml#L4

In particular, we should highlight when a module isn't tested on Windows, see bazelbuild/bazel-central-registry#282 (comment)