Worker: own time-limit listener for Symfony 8.1+ (v0.4.0)

[f3l1x]

Summary

Follow-up to v0.3.0, which was tagged from master. This PR goes into the next release.

• Worker: adds Contributte\Messenger\EventListener\StopWorkerOnTimeLimitListener. Symfony 8.1 deprecated its own listener in favour of the per-command time_limit worker option, and that option can't be set globally. The new listener keeps messenger.worker.timeLimit working on Symfony 7.4 and 8.x without deprecation notices. It has unit tests, and the worker DI test is updated.
• Code: BuilderMan uses findByTag() directly, with the tag values typed as array<string, string>. RoutingPass gets its transport names from BuilderMan. The redundant priority fallback in HandlerPass is removed, because AsMessageHandler::$priority is a non-nullable int.
• Composer: opens 0.4.x-dev.
• Docs: the README version table has a Symfony column, with ^0.3 as stable and ^0.4 as dev.

QA

• Local (PHP 8.5.9, symfony/messenger 8.1.8): make cs, make phpstan and make tests (24 tests) all pass.
• CI (Codesniffer, Coverage, Phpstan, Nette Tester) passes on the release-prep commits.

Proposed version: v0.4.0

Draft release notes (v0.3.0...v0.4.0)

Features

• Worker: bundled StopWorkerOnTimeLimitListener, so worker.timeLimit keeps working on Symfony 8.1+ without deprecations.

Fixes

• BuilderMan: typed findByTag() results (fixes phpstan on current dependencies).
• HandlerPass: removed the redundant priority fallback.

Docs

• Version table now includes Symfony support.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.90%. Comparing base (bb4968f) to head (3330325).

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #32      +/-   ##
==========================================
+ Coverage   95.83%   95.90%   +0.06%     
==========================================
  Files          25       26       +1     
  Lines         648      659      +11     
==========================================
+ Hits          621      632      +11     
  Misses         27       27              

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