message: docs(ref): Add --workspace as a key point
  This is a frequent reason I use them
diff: @@ -5,6 +5,7 @@ members*, that are managed together.
  The key points of workspaces are:
  +* Common commands can run across all workspace members, like `cargo check --workspace`.
  * All packages share a common `Cargo.lock` file which resides in the
  *workspace root*.
  * All packages share a common [output directory], which defaults to a
  