`kobweb create` without any arguments should let you choose from a list

[bitspittle]

This might obsolete kobweb list, but an experience that looks like this....

kobweb create

Please choose a template:
> site
  site/empty
  examples/clock
  examples/todo

This isn't strictly necessary for 1.0, but I might work on it anyway before then because it's a good user experience.