[@CleanBreeze] Hi and welcome! Your race seems interesting but I do have a few opinions about it that I would like settled before accepting you.
Firstly, your technology. Your race can be crafty and intelligent and as such make great leaps in technology, but it makes no sense for a society to perfect something once and then never use it again. If you have some sort of reason for this, I'd love to hear it.
Secondly, your nomadic way of life doesn't fit your description of waterwells, windmills and growing permanent crops in cold climates. Either you are nomadic, or you're not. If you are going for some sort of mix, please explain it so that I may understand how to practically play this race and narrate for you in a fitting manner.
Third, you have specified strengths but no weaknesses. What are the Catmen afraid of? What is their mortal enemy? What societal weakness plagues them? Anything at all would be nice.

Other than those issues I like the idea of your race. If fleshed out more properly I see them as a possible addition to our world.
Hopefully this doesn't discourage you. Attempt to fix the issues specified above and we'll see if you can join us! :)