Add admin management features and MongoDB setup scripts

- Created .vscode/settings.json for Python environment configuration.
- Added run.sh script for MongoDB installation and project setup.
- Implemented admin chat interface in admin_chats.html.
- Developed invoice management interface in admin_invoices.html.
- Created license management interface in admin_licenses.html.
- Added support ticket management interface in admin_tickets.html.
- Implemented user management interface in admin_users.html.
- Developed user chat interface in chat.html.
- Created user invoice overview in my_invoices.html.
- Developed user license overview in my_licenses.html.
- Added support ticket creation and tracking in tickets.html.
- Created test.sh script for MongoDB setup.

Website/data/appointments.json

@@ -12,5 +12,33 @@
     "response": "Es geht leider nicht um die von ihnen angefragte Uhrzeit, bitte versuchen sie es zwei Tage sp\u00e4ter",
     "responded_at": "2026-03-23T16:06:52Z",
     "responded_by": "Aiirondev"
+  },
+  {
+    "id": "a-1774287654152",
+    "username": "Aiirondev",
+    "display_name": "Maximilian Gr\u00fcndinger",
+    "date": "2026-03-26",
+    "time": "10:00",
+    "subject": "Test",
+    "note": "Test",
+    "status": "Bestaetigt",
+    "created_at": "2026-03-23T17:40:54Z",
+    "response": "Wunderbar bis dann!",
+    "responded_at": "2026-03-23T17:41:10Z",
+    "responded_by": "Aiirondev"
+  },
+  {
+    "id": "a-1774296722216",
+    "username": "Aiirondev",
+    "display_name": "Maximilian Gr\u00fcndinger",
+    "date": "2026-03-27",
+    "time": "14:30",
+    "subject": "Erst Gespr\u00e4ch f\u00fcr Grunschule ...",
+    "note": "Erste kontakt aufnahme",
+    "status": "Bestaetigt",
+    "created_at": "2026-03-23T20:12:02Z",
+    "response": "Ja passt so, wir kommen vorbei",
+    "responded_at": "2026-03-23T20:12:43Z",
+    "responded_by": "Aiirondev"
   }
 ]