Adds support for calculating isRTL and license fields in .model_info
compiler.
Also:
* establishes @keymanapp/developer-utils shared module
* moves license validation into @keymanapp/developer-utils
* refactors kmc-model-info to a class and general cleanup
Moves kmc-kmw to being a sub-component of kmc-kmn, as it can never be
independently instantiated anyway. Reorganized tests accordingly.
Note that c8 is currently disabled for kmw-compiler, until we add unit
tests for it.
