feat: events

[michalsn]

Description
This PR introduces an event system that enables users to observe and respond to various queue operations. The $keepDoneJobs option (previously optional and disabled by default) has been removed, as its functionality can now be managed through events.

Since RabbitMQ didn't support the $keepDoneJobs option, this update ensures consistent behavior across all handlers.

Checklist:

• Securely signed commits
• Component(s) with PHPDoc blocks, only if necessary or adds value
• Unit testing, with >80% coverage
• User guide updated
• Conforms to style guide

[coveralls]

Pull Request Test Coverage Report for Build 18417128054

Details

• 274 of 361 (75.9%) changed or added relevant lines in 7 files are covered.
• 14 unchanged lines in 5 files lost coverage.
• Overall coverage increased (+11.7%) to 85.929%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/Handlers/RabbitMQHandler.php	18	24	75.0%
src/Commands/QueueWork.php	64	78	82.05%
src/Handlers/PredisHandler.php	21	40	52.5%
src/Handlers/DatabaseHandler.php	19	40	47.5%
src/Handlers/RedisHandler.php	21	48	43.75%

Files with Coverage Reduction	New Missed Lines	%
src/Handlers/DatabaseHandler.php	1	67.61%
src/Handlers/PredisHandler.php	2	74.74%
src/Handlers/RabbitMQHandler.php	2	83.33%
src/Handlers/RedisHandler.php	2	67.54%
src/Commands/QueueWork.php	7	79.3%

Totals
Change from base Build 17724836360:	11.7%
Covered Lines:	1087
Relevant Lines:	1265

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💛 - Coveralls