refactor(notifications): standardize getRecipients method signatures

app/Notifications/Channels/EmailChannel.php

@@ -13,7 +13,7 @@ class EmailChannel
     {
         try {
             $this->bootConfigs($notifiable);
-            $recipients = $notifiable->getRecipients($notification);
+            $recipients = $notifiable->getRecipients();
             if (count($recipients) === 0) {
                 throw new Exception('No email recipients found');
             }

app/Notifications/Channels/SendsEmail.php

@@ -4,5 +4,5 @@ namespace App\Notifications\Channels;
 
 interface SendsEmail
 {
-    public function getRecipients($notification);
+    public function getRecipients(): array;
 }

app/Notifications/Notification.php

@@ -0,0 +1,22 @@
+<?php
+
+namespace Illuminate\Notifications;
+
+use App\Notifications\Channels\SendsEmail;
+use App\Notifications\Dto\DiscordMessage;
+use App\Notifications\Dto\PushoverMessage;
+use App\Notifications\Dto\SlackMessage;
+use Illuminate\Notifications\Messages\MailMessage;
+
+interface Notification
+{
+    public function toMail(SendsEmail $notifiable): MailMessage;
+
+    public function toPushover(): PushoverMessage;
+
+    public function toDiscord(): DiscordMessage;
+
+    public function toSlack(): SlackMessage;
+
+    public function toTelegram();
+}