Parameters templates and handling

[alecandido]

Since it is annoying to manipulate by hand the parameters.json file, we should add Python methods (and possibly a wrapping CLI) to create meaningful templates, out of a small amount of information.

Both for:

• [ ] creation from scratch
• [ ] existing platform.json addition

Then, a useful format for updates (both in Python and as a file) would be useful, and it could simplify the job of qq update as well (which is essentially doing this, but through Qibocal whole-parameters replacement, following in-place updates).