Less-opinionated typecheck target

[aaronadamsCA]

I was pretty happy to see a new typecheck target in the @nx/js/typescript plugin. Until I tried to use it!

The 'typecheck' target is disabled because one or more project references set 'noEmit: true' in their tsconfig. Remove this property to resolve this issue.

It turns out this target doesn't even try to run a type check at all, but rather an extremely opinionated build:

• You need to migrate to TypeScript project references.
• You need to remove noEmit from your TypeScript config.
• The "type check" emits type declaration files.

IMO these concerns should really be separated.

If you're using project references, sure, I guess a typecheck target that actually builds definition files makes sense.

But if you're not, you should be able to get a simple inferred typecheck target that runs a simple tsc typecheck.