Url instance generator

[AntoinePrv]

Describe the problem or improvement suggested

An instance generator that download a remote archive, extract it, and iterate over the files.

Describe the solution you would like

• [ ] Inherit from a local instance generator (from #165)
• [ ] Find a library to download and extract archive in C++
• [ ] Create a special alias for MIPLIB

Describe alternatives you have considered

Additional context