project.toml reading enhancements

[jessfraz]

#891 was an initial pass and auto looks for a project.toml in the same directory as the kcl input file

enhancements:

• recursively search parents for any project.toml file in the case where the project looks like this

/my-project
/my-project/project.toml
/my-project/some-subdir/
/my-project/some-subdir/thing.kcl

• if no project.toml file found in any parent try to find the app settings and use those defaults

• and at that point we should print back to the user what units we are using and from where for visibility.