This commit introduces a new PendingDispatch class that provides a fluent interface for dispatching async queue jobs with enhanced flexibility and composability.

Key changes:
- Added PendingDispatch class with fluent methods: setMaxAttempts(), onPool(), delay()
- Integrated Conditionable trait for conditional method chaining (when/unless)
- Refactored dispatch() function to return PendingDispatch instead of bool
- Added hyperf/conditionable dependency to composer.json
- Job dispatch now happens automatically in PendingDispatch destructor
- Comprehensive test suite with 100% coverage of all features

Breaking change: dispatch() now returns PendingDispatch instead of bool. Users should not assign the return value unless they understand the implications (as noted in the function documentation).

Migration examples:
- Old: dispatch($job, 60, 3, 'custom');
- New: dispatch($job)->delay(60)->setMaxAttempts(3)->onPool('custom');

…or fluent job dispatching