Is your feature request related to a problem? Please describe.
When using the idea IDE, the cache files created by the IDE will still be considered by the git due to they are not ignored yet. Also the gradle cache is not handled by ignore file yet as well. To make the git stop consider these unnecessary files that will be created during development, maybe consider adding them to the .gitignore.

Describe the solution you'd like
Adding entries below to the repo's .gitignore file:

# idea cache
.idea/
# gradle cache
.gradle/
build/
# run directory (defined in build.gradle)
run/

Describe alternatives you've considered
Well, comparing to comment and entries I listed above, you can also copy the ones list in forge mdk's gitignore.

Additional context
Though this seems not affecting the development as of today, adding them could harm anything, and would be useful for avoid managing caches from git history manually

I have an odd process for handling development, where my dev env lies completely separate from the github repo folder, and I use software (in this case WinMerge) to move over file diffs before committing them.
.gitignore has been updated to match the MDK one plus some extra stuff.