bolshakov / stoplight / 14638977815

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Refactor stoplight using Strategy pattern for improved maintainability (#307)

This refactors the Runnable implementation by introducing the Strategy pattern for
handling different light states (Green, Yellow, Red). The existing fail-safe (`Runnable#safely`) mechanisms
are enhanced through dedicated wrapper classes, resulting in a more maintainable and better-organized codebase.

The current implementation has complex logic inside the Runnable module:

* The run method contains nested conditional logic for each light state
* Error handling and fail-safe behaviors are mixed with business logic
* The safely method provides error resilience but is coupled with the main implementation

This refactoring improves maintainability by separating these concerns and making the code easier to understand and extend.

Co-authored-by: George Asfour <archmage@hey.com>

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