Add user-facing warning if initialization steps fail for some reason

[withered-magic]

If any of the initialization steps like fetching info from bazel info fail (e.g. due to not having bazel on the path or some other failure), we should send a warning for the editor to display to show that functionality might be degraded and offer potential remediation steps).

This ideally would contain the output of the Bazel command (if it failed) as well.