ENH: Enhanced message of the invalid filepath exception in CSVReader.

src/CSVReader/CSVReader.cpp

@@ -12,7 +12,7 @@
 namespace lib4neuro {
     CSVReader::CSVReader(std::string file_path, std::string delimiter, bool ignore_first_line) {
         if(!std::filesystem::exists(file_path)) {
-            throw std::runtime_error("The specified file path does not exist!");
+            throw lib4neuro::FileNotFoundException("The specified file path in CSVReader does not exist!");
         }
 
         this->file_path = file_path;