Expose profile variables in Project or allow Probes to depend on modules

Many variables set through the profile are only accessible through specific modules (like `cpp`, `Qt.core`) thus making them unavailable from the Project scope. It would be nice if we could access the whole profile via either existing `profile` variable that could become an object with all the values or via `qbs.profile`. What I specifically would want are:

1) cpp.toolchainInstallPath
2) Qt.core.incPath

However I reckon other things could come in handy. If exposing the profile is not viable approach would it be possible to depend on modules like `cpp` and `Qt.core` in Probes?