Implement simple cycle search Python binding

[GenieTim]

Closes #804; here, the output is determined by the corresponding parameter.

[GenieTim]

The both option for the output will be requested in a separate PR that can be discussed individually, as it involves more than this function.

[szhorvat]

I would suggest using simply min and max for the parameter names. This will be consistent with cliques(), https://python.igraph.org/en/stable/api/igraph.GraphBase.html#cliques, which is another function with lower and upper limits on the objects returned.