Hi,

I've started to use your provider earlier today and I'm having a few issues and questions.

My main issue is the difference of behavior between the vercel_project.environment block and the vercel_project_environment_variable resource: the first one marks all values as sensitive (which is good for security) but the later doesn't so I risk having values being output when I don't want them displayed.

I also find weird having to specify an id is the vercel_project.environment blocks, but I won't be using them as I much prefer having dedicated resources anyway.

Also, now that this new vercel_project_environment_variable resource exists, not specifying the environment property in a vercel_project shouldn't cause an update of the resource if I never had it specified before: this makes me think that every time I'll update a project property I risk breaking all my env vars and having to re-import them via the vercel_project_environment_variable resources, which I define in different TF runs (kind of like the architecture in #47).

Update: I tried applying the changes on my project and it did break all the env vars (including those that were defined in the same run using vercel_project_environment_variable resources) as I had feared… I had to re-add all of them.
This is not OK for a stable deployment process!