feat: add tests in Chapter 2

tests/fig-2-9_selecting-host-device.cpp

@@ -0,0 +1,26 @@
+// Figure 2-9. Selecting the host device using the host_selector class
+// from book - Data Parallel C++
+// https://link.springer.com/book/10.1007/978-1-4842-5574-2
+
+#include <iostream>
+#include <sycl/sycl.hpp>
+
+int main() {
+  // Create queue to use the host device explicitly
+  sycl::queue Q{sycl::cpu_selector_v};
+
+  std::cout << "Selected device: " << Q.get_device().get_info<sycl::info::device::name>()
+            << std::endl;
+  std::cout << " -> Vendor: " << Q.get_device().get_info<sycl::info::device::vendor>() << std::endl;
+  std::cout << " -> Backend: "
+            << Q.get_device().get_platform().get_info<sycl::info::platform::name>() << std::endl;
+
+  auto device_type = Q.get_device().get_info<sycl::info::device::device_type>();
+  if (device_type != sycl::info::device_type::cpu) {
+    std::cerr << "Error: Selected device is not a CPU device" << std::endl;
+    return -1;
+  }
+
+  std::cout << "Device is CPU: OK" << std::endl;
+  return 0;
+}