Organise the compiler passes properly

[lcobucci]

Removing all duplication and providing a decent class structure.

[rdohms]

Can you provide a bit more detail on what you were thinking? There appears to only be one Pass in the Package.

[rdohms]

Actually, i see the multiple packages now, still would like to hear your intentions.

[lcobucci]

@rdohms this is indeed a quite broad and abstract ticket... we have some duplication on the compiler passes and these are also not tested, we must address that 😁