Move gradually to std::filesystem

[teusbenschop]

It is now time to use the newer filesystem calls from the std::filesystem library.

To keep testing whether it keeps working after the move.

• [ ] Cloud.
• [ ] Linux tarball.
• [ ] Cloud Ubuntu package.
• [ ] Client Ubuntu package.
• [ ] Debian packages - assumed to be good - not yet tested.
• [ ] Android - 5 out of 6 devices had crashes in C++ - remain with the C API - to be retried later.
• [ ] iOS - It builds with std::filesystem but the app is very slow in the simulator - to be retried later.
• [x] macOS
• [x] Windows - may requirer newer Visual Studio
• [ ] If Windows done: Remove thestd::wstring: Nope, this is still needed for other calls.
• [ ] If done: Remove DIRECTORY_SEPARATOR
• [ ] If done: Remove USE_STD_FILESYSTEM

[teusbenschop]

When enabling std::filesystem on Android, several devices had native crashes. This are crashes in C++.

Device(s) with issues Google Pixel 6 (oriole) - Android 12 Google Pixel 5 64-bit only (redfin_64) - Android 13 Google Pixel 7 (panther) - Android 13 Motorola Motorola G20 (java) - Android 11 Generic Small Desktop (x86) (SmallDesktop.x86) - Android 12L

Exceptions Native crash of org.bibledit.android Native crash of org.bibledit.android Native crash of org.bibledit.android Native crash of org.bibledit.android Native crash of org.bibledit.android Native crash of org.bibledit.android

[teusbenschop]

For Ubuntu 22.04 see this issue: https://github.com/bibledit/cloud/issues/960 That is why the std::filesystem is disabled for all of Cloud and Linux client, just to be sure.