WIP notifications and other refactors (#88)

* WIP notifications and other refactors
- refactor notification channels
- send notifications on events related to the servers and sites
- delete server log files on server deletion
- add telegram notification channel
- add new icons
- cache configs and icons on installation and updates
- new navbar for dark mode and settings

* discord channel

* build assets

* pint

app/Mail/NotificationMail.php

@@ -0,0 +1,25 @@
+<?php
+
+namespace App\Mail;
+
+use Illuminate\Bus\Queueable;
+use Illuminate\Mail\Mailable;
+use Illuminate\Queue\SerializesModels;
+
+class NotificationMail extends Mailable
+{
+    use Queueable, SerializesModels;
+
+    public string $text;
+
+    public function __construct(string $subject, string $text)
+    {
+        $this->subject = $subject;
+        $this->text = $text;
+    }
+
+    public function build(): self
+    {
+        return $this->html($this->text);
+    }
+}