Update README.md

handle repository and use case logic

rename repo files

change repo and repo impl files name

change api repo impl

handle database repository implementation

move null check to useCase

send item_id to coffee details screen instead of item_title

optimize imports in project's files

add needed opt-in as freeCompilerArgs in gradle

Merge remote-tracking branch 'origin/master' into master

change package name

Create README.md

handle iced navigation to details screen

add hot and iced coffee type constant