Feature request: ps_from_df

[pfistfl]

I think a nifty feature would be creating a ParamSet (or better, the code to create it) from a data.frame / data.table.
This might go a long way, e.g. for human-in-the-loop BO etc.

Proposed functionality:
input: data.frame
output: str, a copy-pasteable string that creates the ParamSet, preferably using shorthand notation.

• types should be inferred from data.frame types
• levels and limits from the available data
• no support for e.g. inferring constraints / dependencies, the user needs to manually add them.