Add PayPal webhook handler and marketing styles

- Implemented PayPal webhook for handling payment notifications, including signature verification and transaction updates.
- Created invoice generation and license management for software upgrades upon successful payment.
- Added comprehensive logging for debugging purposes.
- Introduced new CSS styles for the marketing file management system, including layout, toolbar, breadcrumb navigation, search filters, and file management UI components.

settings/settingsviews.php

@@ -44,11 +44,14 @@ $all_views = [
     "equipment",
     "equipment_data",
     "equipment_healthindex",
+    "equipment_history",
     "equipment_manage",
     "equipment_manage_edit",
     "equipments",
     "equipments_mass_update",
+    "factuur",
     "firmwaretool",
+    "functions",
     "generate_download_token",
     "histories",
     "history",
@@ -63,6 +66,12 @@ $all_views = [
     "mailer",
     "maintenance",
     "marketing",
+    "marketing_delete",
+    "marketing_files",
+    "marketing_folders",
+    "marketing_migrate",
+    "marketing_tags",
+    "marketing_upload",
     "media",
     "media_manage",
     "media_scanner",
@@ -114,6 +123,7 @@ $all_views = [
     "rmas",
     "sales",
     "security",
+    "service",
     "servicereport",
     "servicereports",
     "settings",
@@ -141,6 +151,7 @@ $all_views = [
     "users",
     "vin",
     "webhook_mollie",
+    "webhook_paypal",
 ];
 
 ?>