docs(config): encode defaults of unwrapped options into schema

This commit ensures that the various default values that the different
Option<T> config properties can be unwrapped to are encoded by schemars
so that they can be picked up by docgen.

komorebi-bar/src/widgets/time.rs

@@ -92,7 +92,7 @@ pub struct TimeConfig {
     ///}
     /// ```
     pub timezone: Option<String>,
-    /// Change the icon depending on the time. The default icon is used between 8:30 and 12:00. (default: false)
+    /// Change the icon depending on the time. The default icon is used between 8:30 and 12:00
     pub changing_icon: Option<bool>,
 }