Fix nullability warnings by initializing fields in constructors

X86Disassembler/PE/ImportDescriptor.cs

@@ -15,6 +15,15 @@ namespace X86Disassembler.PE
         public uint FirstThunk;          // RVA to first thunk
         
         public List<ImportedFunction> Functions { get; } = new List<ImportedFunction>();
+        
+        /// <summary>
+        /// Initializes a new instance of the ImportDescriptor class
+        /// </summary>
+        public ImportDescriptor()
+        {
+            // Initialize string field to avoid nullability warning
+            DllName = string.Empty;
+        }
     }
     
     /// <summary>
@@ -27,5 +36,14 @@ namespace X86Disassembler.PE
         public bool IsOrdinal;      // True if imported by ordinal
         public ushort Ordinal;      // Ordinal value (if imported by ordinal)
         public uint ThunkRVA;       // RVA of the thunk for this function
+        
+        /// <summary>
+        /// Initializes a new instance of the ImportedFunction class
+        /// </summary>
+        public ImportedFunction()
+        {
+            // Initialize string field to avoid nullability warning
+            Name = string.Empty;
+        }
     }
 }