Refactor Sample command

- SampleCommands.php extracted from WillowCommands.php as a standalone task command.
- `eject` removes SampleCommands.php

app/Robo/Plugin/Commands/WillowCommands.php

@@ -14,19 +14,6 @@ final public function docs(): void {
         $this->taskOpenBrowser('https://www.notion.so/ryannerd/Get-Started-bf56317580884ccd95ed8d3889f83c72')->run();
     }
 
-    /**
-     * Launch the built-in PHP server and load the Sample in a web browser
-     */
-    final public function sample(): void {
-        $this->taskServer(8088)
-            ->host('127.0.0.1')
-            ->dir(__DIR__ . '/../../../../public')
-            ->background()
-            ->run();
-        $this->taskOpenBrowser('http://localhost:8088/v1/sample/Hello-World')->run();
-        sleep(15);
-    }
-
     /**
      * Show Willow's fancy banner
      */