Indicate visionOS SDK bundled with Xcode

[jaanus]

Observed: there is no indication of visionOS SDK bundled with Xcode.

Expected: for the Xcode versions that have visionOS, this UI should indicate it.

Note that currently the mainline Xcode 15 doesn’t have visionOS yet, only Xcode 15 betas have it.

[calimarkus]

It's being added in PR #400, which is open since June..

[MattKiazyk]

2.0 (beta) is out now with all the VisionOS bits. Thanks!