Input argument for explicit path comsol installation

[teocala]

Hi there,
I ran into an issue using the library on a Linux cluster where the COMSOL installation was in a non-standard location. As a result, it couldn't be detected by discovery.search_disk() and discovery.search_path(). I've implemented an optional argument to allow users to provide an explicit installation path.

Please note that this is my first PR here, and I have only been able to test these changes on Linux. Thanks for maintaining such a great project! 🙌

[john-hen]

Hi. Before we look at your solution, let's discuss the issue you want to solve here.

[…] COMSOL installation was in a non-standard location. As a result, it couldn't be detected by […] discovery.search_path().

Why not? You can just put that non-standard location on the search path and then Comsol should be found.

[teocala]

Yes, I see the point and I didn't realize it at first.
Given that a workaround exists, this feature doesn’t seem necessary after all.