`dotnet sln add` should allow non-project files to be added to the solution

In my company we often have a small number of files at the solution level for each solution. These include, for example:

• .tfignore/.gitignore file
• .editorconfig

I can’t find anyway to add to these to a solution. The following image shows the result I would like in visual studio.

I would propose a command format such as dotnet sln <SLN_FILE> add file [file1 [file2 [...]]] for adding items to a ‘Solution Items’ folder (as above) and dotnet sln <SLN_FILE> add --directory=MyFolderName file [file1 [file2 [...]]] for adding items to a custom named folder

[forensicmike]

Just throwing my hat in the ring as 😱 that this is still not possible in 2022

[KathleenDollard]

We had a comment on Twitter on this https://twitter.com/peval27/status/1404920313289269248?s=20

Anyone know why we do not already do this?