add cmake as a dependency or at least a recommends, not just a suggests

[Bruno Ivan]

basic functionality is messed up without it, at least on my end! without cmake, any newly created project will show that there are "no suitable kits" because of missing cmake on the system. it's very commonly pulled by other packages but just in case someone else is using a very clean install such as mine and expecting qt creator to work out of the box, it should be installed along with qt creator by default. it's like this on noble ATM.