chore: bootstrap module from working instance and add install guide

permissions/ManageDonations.php

@@ -0,0 +1,33 @@
+<?php
+
+namespace humhub\modules\donations\permissions;
+
+use humhub\libs\BasePermission;
+use humhub\modules\space\models\Space;
+use Yii;
+
+class ManageDonations extends BasePermission
+{
+    public $moduleId = 'donations';
+
+    public $defaultAllowedGroups = [
+        Space::USERGROUP_OWNER,
+        Space::USERGROUP_ADMIN,
+        Space::USERGROUP_MODERATOR,
+    ];
+
+    protected $fixedGroups = [
+        Space::USERGROUP_USER,
+        Space::USERGROUP_GUEST,
+    ];
+
+    public function getTitle()
+    {
+        return Yii::t('DonationsModule.base', 'Manage donations');
+    }
+
+    public function getDescription()
+    {
+        return Yii::t('DonationsModule.base', 'Allows configuring provider options, donation goals, and donation blocks.');
+    }
+}