chore(sdk): test using utf8 chars

Author: Dylan Ross

tests/reader.test.cpp

@@ -20,19 +20,15 @@ namespace fs = std::filesystem;
 
 TEST(Reader, StreamWithManifest)
 {
-    fs::path current_dir = fs::path(__FILE__).parent_path();
+    fs::path current_dir = fs::u8path(__FILE__).parent_path();
     std::cout << "Current directory: " << current_dir << std::endl;
 //    fs::path test_file = current_dir / "../tests/fixtures/CÖÄ_.jpg";
     fs::path test_file = current_dir.parent_path().append("tests").append("fixtures").append("CÖÄ_.jpg");
 
     std::cout << "Test file path: " << test_file << std::endl;
 
-    for (const auto& entry : fs::directory_iterator(test_file.parent_path() )) {
-      std::cout << entry.path().native() << std::endl;
-    }
-
     // read the new manifest and display the JSON
-    std::ifstream file_stream(test_file.native(), std::ios::binary);
+    std::ifstream file_stream(test_file, std::ios::binary);
     ASSERT_TRUE(file_stream.is_open()) << "Failed to open file: " << test_file;
 
     auto reader = c2pa::Reader("image/jpeg", file_stream);