build: skip long-running Actions for README-only modifications
If the only file modified is README.md do not run test-linux or build-windows tasks. This will help streamline onboarding sessions but may help some other cases too.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
If the only file modified is README.md do not run test-linux or build-windows tasks. This will help streamline onboarding sessions but may help some other cases too.