The setting previously used "numeric" and "alphanumeric" as its allowed
values. Rename them to "classic" and "semantic" to better align with the
product terminology for the work package identifier modes.
Includes a migration to update any stored setting values in the database,
updated constants and helper methods on Setting::WorkPackageIdentifier,
and all corresponding references across models, components, forms,
frontend controllers, locales, and specs.
- **it's** is a contraction of _it is_ or _it has_. It requires an
apostrophe.
- **its** is the posssive form of _it_, denoting ownership. It should
not use an apostrophe.
Kabiru Mwenja