Add `.vs` files to `.gitignore`

[czgdp1807]

Description of the problem

.vs files are not ignore as can be seen in #66
They should be added to .vs files as they are automatically generated by system, probably only on Windows.

Example of the problem

References/Other comments

[NeelavaChatterjee]

Can you assign this issue to me?

[czgdp1807]

You can start your work on this issue. Thanks