Detect package name mismatch

[nojaf]

Hi @jfrolich, I found the problem for #7493

It turns out that my package.json name key was not exactly the same as what was used in my rescript.json setup. Causing a mismatch in compile.rs.

So, my setup is:
project package.json

  "devDependencies": {
    "@nojaf/rescript-firebase": "github:nojaf/rescript-firebase#56f74c3140f1a32d9ec8626930deb012d66e8c82",
}

So, this gets installed as node_modules/@nojaf/rescript-firebase
But node_modules/@nojaf/rescript-firebase/package.json had "name": "rescript-firebase".
While node_modules/@nojaf/rescript-firebase/rescript.json had "name": "@nojaf/rescript-firebase".

I would be okay with updating my own code. But this does seem like a restriction the previous build system didn't have. So, maybe updating the code (using config.name.clone(),) makes sense.

I'm not sure.