Compile for WASM

[Skallwar]

Jinko is not able to compile correctly for wasm32-unknown-unknown target.

As we want Jinko to run on exotic targets, this problem highlight the fact that Jinko as modular as we wanted.

This issue will track all the steps needed in order to get Jinko on WASM and hopefully make it easier for future target to be added.

• [X] Separate in features #430 (allow WASM compilation)
• [ ] Properly rework code architecture in meaningful modules
• [ ] Add CI for wasm build
• [X] Add eval function #431
• [ ] Logs in string instead of stdout and stderr #443

[CohenArthur]

We can now compile for WASM thanks to #430, but we should think about splitting the project more in various ways in order to allow more compilation targets, such as non-Linux ones. We should think about a list of issues here to tick off as we go

[Skallwar]

433 is important for the online repl too