Optimize small files

Solves #45

See merge request !34

Draft: Added Nek changes, fixing things

There is a waiting/sleep issue, detected and corrected by Marc

See merge request !33

FMT10 support for cargo

Update fmt to v10 to use newer compilers.

See merge request !32

Draft: Resolve "Integrate expand"

Closes #44

See merge request !31

Resolve "Interface with FTIO"

Closes #40

See merge request !30

Adds Dataclay user library
Adds FTIO CLI extra commands 
Solves pwrite/pread wrong order of parameter bug

CPU Hog removal

This MR removes a CPU hog (100%) on the MPI threads. Using thallium::thread::sleep produces it, we changed to a self::thread::wait_for to remove the extra CPU usage.

See merge request !29