Refactor: Move classes to separate files with one-liner namespace style

X86Disassembler/PE/ImportedFunction.cs

@@ -0,0 +1,22 @@
+namespace X86Disassembler.PE;
+
+/// <summary>
+/// Represents an imported function in a PE file
+/// </summary>
+public class ImportedFunction
+{
+    public string Name;         // Function name
+    public ushort Hint;         // Hint value
+    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;
+    }
+}