Add test script for MSI creation using WindowsBuilder

This commit introduces a new test script, `test_msi.py`, which automates the process of creating an MSI installer. The script utilizes the `WindowsBuilder` class to generate the installer and checks for its successful creation, providing feedback on the result and the file size.

test_msi.py

@@ -0,0 +1,24 @@
+#!/usr/bin/env python
+"""Test MSI creation."""
+
+import sys
+from pathlib import Path
+
+sys.path.insert(0, str(Path(__file__).parent / "build" / "scripts"))
+
+from build_windows import WindowsBuilder
+
+
+if __name__ == "__main__":
+    builder = WindowsBuilder()
+    print("Creating MSI installer...")
+    result = builder.create_msi()
+    print(f"MSI Creation Result: {result}")
+    
+    # Check if MSI was created
+    msi_path = builder.dist_dir / f"WebDropBridge-{builder.version}-Setup.msi"
+    if msi_path.exists():
+        print(f"\n✅ MSI created successfully: {msi_path}")
+        print(f"   Size: {msi_path.stat().st_size / 1024 / 1024:.1f} MB")
+    else:
+        print(f"\n❌ MSI not found: {msi_path}")