feat: add HW#5#21

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AlehBarushka wants to merge 2 commits intoAndroid-Developer-Basic:masterfrom

AlehBarushka:hw5

Commits on Oct 29, 2023

feat: add Singleton, Builder, Command and Decorator patterns
AlehBarushka
committed

Commits on Oct 30, 2023

fix: update Decorator
AlehBarushka
committed