Created src folder, created docs folder, added Pflichtenheft

src/Models/Asset.cs

@@ -0,0 +1,10 @@
+namespace Berufsschule_HAM.Models;
+public class Asset
+{
+    public required string Dn { get; set; }            // Full LDAP DN (readonly in many cases)
+    public required string CommonName { get; set; }    // cn (display name)
+    public required string SerialNumber { get; set; }  // serialNumber
+    public required string Description { get; set; }   // description (notes)
+    public required string Location { get; set; }      // l (location)
+    public required string Owner { get; set; }         // owner (uid of owner)
+}

src/Models/ErrorViewModel.cs

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+namespace Berufsschule_HAM.Models;
+
+public class ErrorViewModel
+{
+    public string? RequestId { get; set; }
+
+    public bool ShowRequestId => !string.IsNullOrEmpty(RequestId);
+}