text: Title: Add formulas to input fields
  Body: **Is your feature request related to a problem? Please describe.**
  I would like to support Excel-like formulas to perform complex piecemeal transformations directly within the input field.
  
  **Describe the solution you'd like**
  * Standard feature. A nice to have would be a suggestive dropdown via a slash command
  * We could consider python standard functions + polars
  