Backendenhancementhelp wanted
Description
By default gspread loads formatted values from Google Spreadsheets, but it makes more sense to load unformatted values (123.0 instead of $123.0).
We use the get_all_values method. Unlike other getters this one doesn't take a value_render_option, but we can:
- Reimplement its behavior by using the lower level API it calls.
- Submit a pull request upstream to take this option for this method too.