Changing template project back to main branch of onyx

Adding gamecore and volume editor targets to default project

Fixed missing set for working directory for visual studio

Removed obsolete call to generate_project_ini and moved template project to the dev branch for the time being

Fixed wrong directory name for add_subdirectory in root cmake file

Adding entry point file back to register engine classes and fixing include paths for game system

Fixed template project create script

Moved project dummy system to correct directory

Removed appconfig which should not be part of the template project

Fixing template project with latest main

Updated template project for onyx 0.4.0

Removed documents as they are part of the Onyx engine documentation

Fixed condition to not run rename github action on template repro

Revert "✅ Ready to clone and code."

✅ Ready to clone and code.