Add Column.set_index

[iamrecursion]

Pull Request Description

This also adds the ability to index a Table by an explicit Column.

Important Notes

N/A

Checklist

Please include the following checklist in your PR:

• The documentation has been updated if necessary.
• All code conforms to the Scala, Java, and Rust style guides.
• All documentation and configuration conforms to the markdown and YAML style guides.
• All code has been tested where possible.