feat: adds Lesson23's Library API assignment - TaliaCrockett#746

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tmcrockett252 wants to merge 4 commits intocode-differently:mainfrom

tmcrockett252:lesson_23

Commits on Oct 4, 2025

feat: add GET /items/{id} endpoint to retrieve single media item
tmcrockett252
committed

Commits on Oct 6, 2025

feat: adds PostMapping annotation and method
tmcrockett252
committed

Commits on Oct 7, 2025

feat: adds DeleteMapping annotation and method for the server to run
tmcrockett252
committed
fix: updates the addItem method for test to be successful
tmcrockett252
committed