feat: add Windows platform support

internal/config/permissions_windows.go

@@ -0,0 +1,24 @@
+//go:build windows
+
+package config
+
+import (
+	"os"
+)
+
+// SetSecureFilePermissions configures secure permissions on Windows
+func SetSecureFilePermissions(filepath string) error {
+	// On Windows, file permissions work differently
+	// We ensure the file is not read-only and has basic permissions
+	info, err := os.Stat(filepath)
+	if err != nil {
+		return err
+	}
+
+	// Ensure the file is not read-only
+	if info.Mode()&os.ModeType == 0 {
+		return os.Chmod(filepath, 0600)
+	}
+
+	return nil
+}