Proposal: Inline comments for ternary and presence check operations

Presence checks (only outputs if the condition is met):
```kt
/*?+ MC >= 1.19.2 ? val client = myClient ?*/
```

Ternary condition:
```kt
val client = /*? MC >= 1.16.5 ? */ currentVersionValue /* : otherVersionValue ?*/
```

These are small additions which would mostly only be useful for Mixin definitions, annotation parameters or smaller variables which may differ between versions.