Some tests to work out how to create and use dynamic librairies in Rust, and if we should ?

This work was made as part of a Stormshield R&D project.

The tested hypothesis are on git branches :

• simple : simple working use case without async
• pass_handle_to_remote : we try to pass a tokio handle to the library ; that doesn't work
• remote_future : we try to export a future from the library and run it in the main program ; that doesn't work
• tokios : we use two tokios runtimes ; that works