Update command sending from server API to use new daemon code

app/Repositories/Wings/DaemonCommandRepository.php

@@ -2,6 +2,27 @@
 
 namespace Pterodactyl\Repositories\Wings;
 
+use Webmozart\Assert\Assert;
+use Pterodactyl\Models\Server;
+use Psr\Http\Message\ResponseInterface;
+
 class DaemonCommandRepository extends DaemonRepository
 {
+    /**
+     * Sends a command or multiple commands to a running server instance.
+     *
+     * @param string|string[] $command
+     * @return \Psr\Http\Message\ResponseInterface
+     */
+    public function send($command): ResponseInterface
+    {
+        Assert::isInstanceOf(Server::class, $this->server);
+
+        return $this->getHttpClient()->post(
+            sprintf('/api/servers/%s/commands', $this->server->uuid),
+            [
+                'json' => ['commands' => is_array($command) ? $command : [$command]],
+            ]
+        );
+    }
 }