solutions: added part 4/5 updated 2/3

.../temporalpractice/bakery/kitchen/KitchenWorkflowImpl.java

...day1/part-3.0/temporalpractice/bakery/MakeCookiesApp.java

...ay1/part-3.0/temporalpractice/bakery/OrderCookiesApp.java

...s/day1/part-3.0/temporalpractice/bakery/bake/BakeApp.java

...y1/part-3.0/temporalpractice/bakery/bake/BakeService.java

...art-3.0/temporalpractice/bakery/bake/BakeServiceImpl.java

...rt-3.0/temporalpractice/bakery/bake/dtos/BakeRequest.java

...art-3.0/temporalpractice/bakery/bake/dtos/BakeResult.java

...y1/part-3.0/temporalpractice/bakery/batter/BatterApp.java

...art-3.0/temporalpractice/bakery/batter/BatterService.java

...3.0/temporalpractice/bakery/batter/BatterServiceImpl.java

.../part-3.0/temporalpractice/bakery/batter/dtos/Batter.java

...ralpractice/bakery/batter/dtos/BatterCreationRequest.java

...oralpractice/bakery/batter/dtos/BatterCreationResult.java

.../part-3.0/temporalpractice/bakery/kitchen/KitchenApp.java

...rt-3.0/temporalpractice/bakery/kitchen/KitchenWorker.java

...-3.0/temporalpractice/bakery/kitchen/KitchenWorkflow.java

.../temporalpractice/bakery/kitchen/KitchenWorkflowImpl.java

...oralpractice/bakery/kitchen/batter/BatterServiceImpl.java

...3.0/temporalpractice/bakery/kitchen/dtos/KitchenDtos.java