Use dedicated function to convert QString to std::filesystem::path II

Some missed conversions identified in review.

apps/launcher/datafilespage.cpp

@@ -723,7 +723,7 @@ void Launcher::DataFilesPage::addArchivesFromDir(const QString& path)
     for (const auto& fileinfo : dir.entryInfoList())
     {
         const auto absPath = fileinfo.absoluteFilePath();
-        if (Bsa::CompressedBSAFile::detectVersion(absPath.toStdString()) == Bsa::BSAVER_UNKNOWN)
+        if (Bsa::CompressedBSAFile::detectVersion(Files::pathFromQString(absPath)) == Bsa::BSAVER_UNKNOWN)
             continue;
 
         const auto fileName = fileinfo.fileName();

apps/launcher/utils/cellnameloader.cpp

@@ -1,6 +1,7 @@
 #include "cellnameloader.hpp"
 
 #include <components/esm3/loadcell.hpp>
+#include <components/files/qtconversion.hpp>
 
 QSet<QString> CellNameLoader::getCellNames(QStringList& contentPaths)
 {
@@ -12,7 +13,7 @@ QSet<QString> CellNameLoader::getCellNames(QStringList& contentPaths)
     {
         if (contentPath.endsWith(".omwscripts", Qt::CaseInsensitive))
             continue;
-        esmReader.open(contentPath.toStdString());
+        esmReader.open(Files::pathFromQString(contentPath));
 
         // Loop through all records
         while (esmReader.hasMoreRecs())