Add integration workflow

[LVMVRQUXL]

This request makes the gradlew file executable and adds an integration workflow to the repository.

This integration workflow will trigger whenever a push or a pull request updates a Gradle file, a Kotlin file or the workflow itself. It can also be triggered manually.

It is responsible for doing the following tasks:

• validating the Gradle wrapper for security purpose
• submit the runtime dependencies of the application to the GitHub repository
• running all checks of the application.