[FEA] dataframe.mode() axis parameter not supported

**Is your feature request related to a problem? Please describe.**
The cudf documentation lists the mode function's {axis=0,1} parameter, but then has an additional note that "axis parameter is currently not supported.": https://docs.rapids.ai/api/cudf/stable/api_docs/api/cudf.DataFrame.mode.html

**Describe the solution you'd like**
Is this feature possible to be implemented? Or is there an underlying challenge with replicating this pandas functionality in cudf?

**Additional context**
NVIDIA Solutions Architect, filing on behalf of customer