On the 1.19 branch there is all the required files for doing PR's and actually helping the project, could you add the same files for 1.12.2 here is a list:

• build.gradle
• gradle.properties
• gradlew
• gradlew.bat
• .gitignore

And the gradle/wrapper folder and its content.

Just remove it from your .gitignore and push.

Unfortunately that does not work. I have reworked my entire setup for 1.19. The setup for 1.12 is quite bad and does not work like that. There is a video of how the workspace is setup: https://www.youtube.com/watch?v=7Ahshi_QjM4