Add Default implementation for CommandRegistry and update examples

Implement Default trait for CommandRegistry to simplify instantiation, making it easier to create a default instance.

crates/rbchat/src/chat/command_registry.rs

@@ -28,6 +28,12 @@ pub struct CommandRegistry {
     commands: HashMap<String, CommandInformation>,
 }
 
+impl Default for CommandRegistry {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
 impl CommandRegistry {
     pub fn new() -> Self {
         CommandRegistry {

crates/rbchat/src/config/config_file.rs

@@ -20,7 +20,7 @@
 //!
 //! Here’s an example of how you can utilize this module:
 //!
-//! ```rust
+//! ```no_run
 //! // Get the current application configuration
 //! use rbchat::config::CONFIG;
 //! let config = CONFIG.lock().unwrap();

crates/rbchat/src/config/mod.rs

@@ -20,7 +20,7 @@
 //!
 //! Here’s an example of how you can utilize this module:
 //!
-//! ```rust
+//! ```no_run
 //! // Get the current application configuration
 //! use rbchat::config::CONFIG;
 //! let config = CONFIG.lock().unwrap();

crates/rbchat/src/persona/mod.rs

@@ -17,7 +17,7 @@
 //!
 //! You can list all available personas and see how they can assist you in your session with Rusty Buddy:
 //!
-//! ```rust
+//! ```no_run
 //! use rbchat::persona::{print_all_personas, get_persona};
 //!
 //! // Print all available personas