Flat File Import - Save/Restore setup and other enhancements

[AdamantiumKiwi]

I do a lot of importing of csv files, and have been using the Flat File import wizard in SSMS.

When I import a table into SQL Server, I have this workflow:

0. Manually drop the previous imported staging table (because I can't truncate/rewrite using the wizard)
1. Open the Flat File Import wizard
2. Select the file, set the target table name (usually includes a "tmp_" prefix) and schema
3. Press Next twice
4. Click the checkbox to set all columns NULLable
5. For each column, paste NVARCHAR(MAX) into each datatype (Ctrl+V, right arrow-down arrow-left arrow and repeat n times)
6. Press Next, Finish, wait, press Close.

This is tedious and error prone , and if for example I get the keystrokes out of order and accidentally paste the NVARCHAR(MAX) into the column name I have to go back to the beginning because there's no undo :(

The Flat File Import in VS Code can't use this workflow - Paste doesn't work on the data type, so I have to manually scroll down to the entry and click it.

Please, can we get the following enhancements:

1. [This one almost fixes everything :)] The ability to Save an import configuration (as JSON, XML, YAML, or similar) including the source filename, target table and schema, column definitions etc, and restore it later, with the ability to then update the parameters before running it again.
2. [This is very specific to me, but might be useful to others] A "Set all columns to NVARCHAR(MAX)" toggle (could have be a selectable datatype)
3. Cut/Paste and Undo/Redo on column definition changes.
4. [Bonus points] The ability to run the wizard from the command line to allow scripting etc.