Make an interface for user preferences

[mustachemo]

• Have a settings frontned/interface to pick/enforce the data types for each column
• Also check if the cells in that column can be nullable with a boolean? https://dash.plotly.com/datatable/conditional-formatting

[mustachemo]

• Added a data type enforcment button. Setting datat types there for each column will update the "columns" variable for each data type set.
• To access the enforced datat types, check each columns "type". The values can be ["text", "numeric", "datetime", "any"]