Make some cool debugging tools

[Boris-rnd]

Traceback
Bind shell function on startup
...

[Boris-rnd]

Remove all unwraps and possible crashable pièces of code

[Boris-rnd]

We could make a "server" on host that parses the qemu output to get some data (for example the kernel size, or some other infos) that we would store on host for debugging

We will also need to add some features for debugging & testing and "prod" when we test on real computer