Add Table.Offset

[AdRiley]

Pull Request Description

Adds Table.Offset. Column.Offset to follow in next MR and also future MR for Fill_With.Constant

Important Notes

Checklist

Please ensure that the following checklist has been satisfied before submitting the PR:

• The documentation has been updated, if necessary.
• Screenshots/screencasts have been attached, if there are any visual changes. For interactive or animated visual changes, a screencast is preferred.
• All code follows the
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• Unit tests have been written where possible.
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  or the Snowflake database integration, a run of the Extra Tests has been scheduled.
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[jdunkerley]

A few nits.
Like how simple the actual inner worker is.