Wave utils

Make a separate package of utility functions that help with easier integration between Wave and common AI tooling. One such example would be converting a dataframe into a Wave table.

Use https://github.com/h2oai/wave-utils as a starter.

## Community proposals

If you have an idea for a particular util function that could be useful to others, please comment on this issue. If you can also provide an implementation, that would be even better.

Start by reviewing the h2oai/wave-utils repository linked in the issue as the proposed starting point. Define a focused utility, such as converting a dataframe into a Wave table, and establish what belongs in the separate package before implementing and documenting the chosen integration.

Written by the indexing model from the issue text.