notedeck app: add clndash

a core-lightning dashboard i'm working on

feature-gate it behind --clndash

Signed-off-by: William Casarin <jb55@jb55.com>

crates/notedeck/src/args.rs

@@ -126,6 +126,8 @@ impl Args {
                 res.options.set(NotedeckOptions::RelayDebug, true);
             } else if arg == "--notebook" {
                 res.options.set(NotedeckOptions::FeatureNotebook, true);
+            } else if arg == "--clndash" {
+                res.options.set(NotedeckOptions::FeatureClnDash, true);
             } else {
                 unrecognized_args.insert(arg.clone());
             }

crates/notedeck/src/options.rs

@@ -26,6 +26,9 @@ bitflags! {
         // ===== Feature Flags ======
         /// Is notebook enabled?
         const FeatureNotebook = 1 << 32;
+
+        /// Is clndash enabled?
+        const FeatureClnDash = 1 << 33;
     }
 }