feat: add draggable change of column order to FluentDatagrid

[RobDene]

🙋 Feature Request

It's an often requested feature from users of anything we build to be able to change the order of the columns in a Datagrid

🤔 Expected Behavior

To allow for any Datagrid column order to be rearranged by drag and drop

😯 Current Behavior

Columns are fixed to their initial layout position in the grid

💁 Possible Solution

Build in the capability to the Fluent Datagrid component

🔦 Context

Users like to see the columns in a personal order according to what they are working on

[vnbaaij]

I think this requires quite a bit of changes to the DataGrid code and script. We don't have any plans on working on this in the short term as we are too busy with building v5 of the library. Once that is done, we might take a stab at this.

In the meantime, if someone from the community want to have a goa at this, we would very much welcome a PR...