Backport exemplar standards to cookbook [#69557162]

- Adds integration and unit specs
- Adds LICENSE file
- Updates metadata file
- Removes Cheffile.lock
- Removes feature flag attributes
- Removes inclusion of update_font recipe from default.  If you want the font updated you have to run the default plus this new recipe
- Adds dependency on sprout-base to get the proper user home dir
- Refactors recipes to improve readablility, extract variables, remove conditionals like feature flags and improve testability.