Add support for command permissions to the framework

src/framework/commands/runner.rs

@@ -31,12 +31,21 @@ impl<T: Send + Sync + 'static> OnMessageHandler<T> for CommandRunner {
                 });
 
                 if let Some(command) = command {
-                    command
-                        .execute(
-                            CommandContext::new(event, rt.clone(), &prefixes[0]),
-                            parts.args,
-                        )
-                        .await?;
+                    let ctx = CommandContext::new(event, rt.clone(), &prefixes[0]);
+
+                    for permission in command.permissions() {
+                        if !permission
+                            .check(&ctx)
+                            .await
+                            .inspect_err(|e| log::error!("Permission check failed: {e}"))?
+                        {
+                            return Err(
+                                format!("The check for permission {permission:?} failed").into()
+                            );
+                        }
+                    }
+
+                    command.execute(ctx, parts.args).await?;
 
                     break;
                 }