add fruit trees

[neonfrontier]

Hello,
Thanks for writing such an awesome tool.
Would you consider adding fruit trees?
I've been doing some reading and it looks like fruit trees in the greenhouse can make quite a lot of cash! It would be great to be able to use a calculator for this.

Thanks again! :D

[polarstoat]

I'm glad to hear it's proving useful!

I'll consider this. Fruit trees aren't technically a crop in the same way other produce is, but it would be good to be able to visualise how they compare against the other crops.