chore: check exact paths of test executable and provide temp dir

test/Catch2Common/OatTestPaths.h

@@ -0,0 +1,10 @@
+#pragma once
+
+#include <filesystem>
+
+namespace oat::paths
+{
+    std::filesystem::path GetSourceDirectory();
+    std::filesystem::path GetTestDirectory();
+    std::filesystem::path GetTempDirectory();
+} // namespace oat::paths