feat: new player endpoints (put + get) + update structure and readme

README.md

build.gradle.kts

src/main/kotlin/Application.kt

src/main/kotlin/configuration/ApiConfiguration.kt

...ain/kotlin/configuration/ApiDocumentationConfiguration.kt

src/main/kotlin/configuration/DynamoDbConfiguration.kt

src/main/kotlin/configuration/InjectionConfiguration.kt

src/main/kotlin/configuration/RoutingConfiguration.kt

src/main/kotlin/configuration/SecurityConfiguration.kt

src/main/kotlin/player/PlayerRepository.kt

src/main/kotlin/player/PlayerRoute.kt

src/main/kotlin/player/PlayerService.kt

src/main/kotlin/player/PlayerServiceImpl.kt

src/test/kotlin/player/PlayerIntegrationTest.kt