build: removed nested project setup

.gitignore

app/backend/build.gradle.kts

app/settings.gradle.kts

build.gradle.kts

gradle/libs.versions.toml

settings.gradle.kts

...n/kotlin/de/fraunhofer/iem/app/DataProviderApplication.kt

src/main/kotlin/de/fraunhofer/iem/app/StartUpHandler.kt

...in/kotlin/de/fraunhofer/iem/app/configuration/ApiPaths.kt

...unhofer/iem/app/configuration/DirectoryPathsProperties.kt

...in/de/fraunhofer/iem/app/configuration/InitialProjects.kt

...fraunhofer/iem/app/configuration/OpenCodeApiProperties.kt

...ofer/iem/app/configuration/OpenCodeGitlabApiProperties.kt

...raunhofer/iem/app/configuration/security/ApiKeyService.kt

...e/fraunhofer/iem/app/configuration/security/JwtService.kt

...ofer/iem/app/configuration/security/SecurityProperties.kt

...em/app/configuration/security/WebSecurityConfiguration.kt

.../fraunhofer/iem/app/gitlab/controller/GitlabController.kt

...in/kotlin/de/fraunhofer/iem/app/gitlab/dto/CommitStats.kt

...main/kotlin/de/fraunhofer/iem/app/gitlab/dto/MemberDto.kt