com.phasmidsoftware.number.cats

Centralized Cats Kernel instances, kept out of core companion objects to avoid forcing a Cats dependency on core types at definition sites.

Import usage: import com.phasmidsoftware.number.instances.catsKernel._

Lightweight wrappers representing common error metrics so that we can endow them with Cats algebra instances without dragging Number/Fuzziness context (factor, nominal value, etc.).

Each wrapper models the magnitude of an uncertainty under the assumption of independent errors. They serve as the core building blocks for folding or parallel aggregation of fuzzy quantities.