Refactor Units making it constexpr, immutable, with repetition reduced.
Separate data from code.
Constexpr constructed units allow constructing predefined Quantities
from predefined unit types.
* Prevent naming properties with reserved words (Fix#16846)
* Prevent using reserved constant names for properties or aliases
* [pre-commit.ci] auto fixes from pre-commit.com hooks
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* App: Add unit test for isTokenAConstant
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Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Chris Hennes <chennes@pioneerlibrarysystem.org>
