Extract query to cucumber query

[mattwynne]

Description

Extract Cucumber::Query and Cucumber::Repository out of cucumber-ruby and consume them from the new cucumber-query Ruby gem.

The query implementation has been moved to the cucumber-query PR branch, and this PR wires cucumber-ruby to that branch until cucumber-query is merged and released.

Motivation: the query/repository code is message-querying infrastructure and belongs in cucumber-query rather than inside cucumber-ruby. Keeping cucumber-ruby green while depending on cucumber-query gives us a safe migration path before replacing the temporary git dependency with a released gem dependency.

Depends on cucumber/query PR: TODO

Type of change

• Refactoring (improvements to code design or tooling that don't change behaviour)

Checklist:

Your PR is ready for review once the following checklist is
complete. You can also add some checks if you want to.

• New and existing tests are passing locally and on CI
• bundle exec rubocop reports no offenses
• RDoc comments have been updated
• CHANGELOG.md has been updated