Find convenient way to handle the .idea folder

[ammerzon]

Right now, the name of the JVM is hardcoded in the Gradle file, which is a problem if your JVM in IntelliJ has a different name.
Additionally, changes to the JVM / project structure are picked up as version control changes, which we want to avoid.

Definition of Done

• The project can be imported into any JetBrains IDE regardless of the installed JVM name
• The Jetbrains IDE support is OS independent
• Changes to the project structure are not tracked in the version control

Tasks

• Find a feasible solution
• Sync with the project maintainers about the proposed solution
• Implement the accepted solution
• Document solution (DEV-GUIDE.md)
• Test solution on different operating systems

Additional context

• Possible idea would be a script that creates the .idea contents
• Think about how to do it - should we use Gradle, Bash / CMD?
• https://youtrack.jetbrains.com/issue/IDEA-276735