Added more tests and fixed mutation

[s1lver]

Q	A
Is bugfix?	❌
New feature?	❌
Breaks BC?	❌
Fixed issues	#5

[what-the-diff[bot]]

PR Summary

• Added FakeAdapter and UnitTestCase files Introduced new files called FakeAdapter.php and UnitTestCase.php to improve the codebase
• Updated DelayMiddlewareTest Modified the test class to use the new Adapter class and replaced TestCase with UnitTestCase
• Adjusted typehints in ExchangeSettingsInterface and QueueSettingsInterface classes Typehints were fixed to include the correct types like string
• Added @infection-ignore-all annotation in Adapter class This annotation was placed before a method to ignore it during infections/mutator testing
• Refactored code to use AMQP instead of Redis Replaced all Redis-related code with AMQP equivalents, improving compatibility with AMQPStreamConnection, QueueProvider, and MessageSerializer.