Initial Ladill Hosting app with Gitea deploy pipeline.

Shared web hosting extracted from the platform monolith, with CI deploy
to /var/www/ladill-hosting matching Bird/Domains/Email.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/Services/Infrastructure/ContaboInfrastructureSshKeyService.php

@@ -0,0 +1,34 @@
+<?php
+
+namespace App\Services\Infrastructure;
+
+class ContaboInfrastructureSshKeyService
+{
+    /**
+     * @return array{public_key: string, private_key: string}
+     */
+    public function generate(): array
+    {
+        $resource = openssl_pkey_new([
+            'private_key_bits' => 4096,
+            'private_key_type' => OPENSSL_KEYTYPE_RSA,
+        ]);
+
+        if ($resource === false) {
+            throw new \RuntimeException('Failed to generate SSH key pair.');
+        }
+
+        openssl_pkey_export($resource, $privateKey);
+        $details = openssl_pkey_get_details($resource);
+        $publicKey = $details['key'] ?? '';
+
+        if ($publicKey === '') {
+            throw new \RuntimeException('Failed to export SSH public key.');
+        }
+
+        return [
+            'public_key' => trim($publicKey)."\n",
+            'private_key' => $privateKey,
+        ];
+    }
+}