This macro simplifies message printing, so we can respect
`org-roam-verbose` in more places. Also silences more messages when
`org-roam-verbose` set to false.
`org-roam-doctor` provides a diagnostic tool for checking an Org-roam
file for things that are broken. Currently implemented is a check for
broken links, and methods to fix them. The checker is designed to be
extensible.
