feat(windows): BCP47 support with respect to sub tags

This Issue needs some investigation and design to see if Keyman is going to mirror the way Windows 11 handles the BCP47 support.
For Windows:
If the lang-tag has a suppress-script entry in language-subtag-registry, then the script is not required in language registration otherwise, script is always required.

Update KM to always give script unless it matches the suppress-script suppress-script is apparently stable and won't change in future ref https://github.com/keymanapp/keyman/issues/12012