v1.0.0

The stability release, in step with rasuvaeff/property-testing-core 1.0.0.
The adapter's surface is that of 0.10.0, unchanged: the PropertyTesting
trait, the forAll() chain with its knobs, PropertyCheck, the listeners
and the environment table. A project on ^0.10 upgrades by widening the
constraint to ^1.0.

• Requires rasuvaeff/property-testing-core ^1.0 (compatibility policy
  §8: a caret on the engine's current major).
• Docs: the footnotes that dated a behaviour to a core 0.x release
  (since core 0.9, core 0.9 reads only …) are gone from the READMEs,
  llms.txt and AGENTS.md; llms.txt names the current requirement.