Display a meaningful error warning when KDS path is not provided when running yarn run devserver-with-kds

[MisRob]

This is a follow-up to #11446 which introduced devserver-with-kds package.json command. This command requires KDS path being specified, e.g. yarn run devserver-with-kds /path/to/kolibri-design-system.

Currently, when we forget to specify the KDS path and run only yarn run devserver-with-kds, unless one is familiar with the command in detail, it is hard to figure out why the command doesn't work as expected.

We'd ideally show an error warning when the path is missing.

[KshitijThareja]

Hi @MisRob. I'd like to work on this issue. Could you please assign it to me?
Thanks :)

[MisRob]

Hi @KshitijThareja, thank you. I'd like to wait to @Jaspreet-singh-1032 for a bit to confirm whether he'd like to work on this since it's a follow-up to his recent work and we talked about continuing some of it.

[Jaspreet-singh-1032]

@MisRob, thanks for creating this follow-up.

Hi @KshitijThareja, If you want to work on it, you can proceed. Feel free to let me know if you need any help.

FYI I had added a kds flag in the previous PR to know if the yarn command is run using devserver-with-kds. But it was removed later because It was an extra flag and was not needed at that moment. But now I think you will need to add that flag back because otherwise, I think there is not any other way to know if the yarn command is run using devserver or devserver-with-kds. So, I think you can use this approach or try if you have any other ideas.

[KshitijThareja]

Thanks @Jaspreet-singh-1032. I'd definitely approach you if I need any help. And thanks for your suggestion too, I'll look into it.

[MisRob]

Okay, thanks both :) Assigning you, @KshitijThareja

[MisRob]

@KshitijThareja I've just merged @Jaspreet-singh-1032 PR #11446 to the release branch so it should be now available for further work

[MisRob]

Closed by #11657