adding Cat vaccination, implementing Strategy pattern

[ghadyg]

Pull Request Title: Implement Strategy Pattern for Pet Vaccination

Description

This pull request introduces a strategy pattern implementation for pet vaccination in the VaccinationService. Two specific implementations are provided: one for dog vaccinations and one for cat vaccinations.

Changes Made

• VaccinationServiceImpl: Updated the save method to utilize a Map<PetType, VaccinationStrategy> for delegating vaccination logic based on the pet type.
• VaccinationStrategyConfig: Supplies DogVaccinationStrategy and CatVaccinationStrategy beans, facilitating easier implementation and selection of the appropriate vaccination strategy in the service.
• VaccinationStrategy Interface: Created an interface for vaccination strategies that define the vaccinate method.
• DogVaccinationStrategy: Implemented the vaccination logic specific to dogs.
• CatVaccinationStrategy: Implemented the vaccination logic specific to cats.
• VaccinationServiceTest: Modified the unit tests to work with the new implementation pattern and ensure all tests pass successfully.

Notes

Please review the implementation of the strategy pattern for any potential improvements or adjustments. Feedback is welcome!

[josdem]

I like it @ghadyg good job! just a small change before merge.

[kaminuma]

looks good!
good job