cli-output: Add a path to handling --verbose and --quiet display

cli-output/src/lib.rs

@@ -1,3 +1,15 @@
 mod cli_output;
 pub mod display;
 pub use cli_output::*;
+
+pub trait QuietDisplay: std::fmt::Display {
+    fn write_str(&self, w: &mut dyn std::fmt::Write) -> std::fmt::Result {
+        write!(w, "{}", self)
+    }
+}
+
+pub trait VerboseDisplay: std::fmt::Display {
+    fn write_str(&self, w: &mut dyn std::fmt::Write) -> std::fmt::Result {
+        write!(w, "{}", self)
+    }
+}