hatch's approach to project installation

[wshanks]

I ran into the problem mentioned in #781 where I tried to put "Internal use only" for the license and hatchling failed to build the wheel. I thought it was a formatting issue, so I changed the license name and hatchling no longer complained. I thought it stopped complaining because my new license name was accepted but it turned out to be that hatch just did not re-run the install and left me with an environment without my project installed which was confusing.

Based on the discussion in #771 (and what is reported in #698), it seems like hatch installs a project when an environment is created and then does not install it again (for either value of dev-mode). Is that right? If not reinstalling the project on run, maybe hatch could check that the project is at least installed when doing a run? (I also wonder if some might prefer an "always reinstall" option which might add a few seconds to commands).