Create a column subtracting values from two columns

**Describe the solution you'd like**
Add subtraction as part of the operations allowed to create new columns. Reported by Leah Macfadyen using the tool in UBC Canada.

Look for the code that handles column creation operations, likely in a module related to data transformations or column definitions. Identify where operations like addition are implemented and extend it to support subtraction. Test the new feature by creating a column that subtracts values from two existing columns in the UI or via an API call.

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