docs: add EricksonLopez.DomainPrimitives to the comparison #182

Problem

docs/comparison.md has nothing on EricksonLopez.DomainPrimitives, a value-object generator first published in August 2026 (3.0.0 on 2026-09-20). It targets .NET 8, 9 and 10, declares value objects by attribute on a readonly partial record struct, ships a catalogue of ready-made types ([Email], [IBAN], [Money] and others), value objects of several members, smart enums, and packages for EF Core, Dapper, Swashbuckle, Newtonsoft.Json and testing. A reader who knows it finds nothing on the page about it.

Change

• Record what was read from its source at tag v3.0.0 as a design/knowledge/ entry pinned external EricksonLopez.DomainPrimitives 3.0.0, dated, with its row in the knowledge index, and its first release in KB-045.
• Add its column to "Value objects in detail", and rows in "Choose something else when" where it fits better than TypeKit (.NET 8 and 9, Dapper and Swashbuckle, a ready-made catalogue of validated types).
• Add it to the README's list of compared libraries.

Done when

• The page has an EricksonLopez.DomainPrimitives column, each cell resting on the new knowledge entry.
• docs-query check and the conventions tests pass.