=== FINAL TREE STRUCTURE ===
. is_file=F has_next_sib=F
app is_file=F has_next_sib=T
main.f90 is_file=T has_next_sib=F
src is_file=F has_next_sib=T
core is_file=F has_next_sib=T
dir_helpers.c is_file=T has_next_sib=T
file_system.f90 is_file=T has_next_sib=T
types.f90 is_file=T has_next_sib=F
gui is_file=F has_next_sib=F
gtk_app.f90 is_file=T has_next_sib=F
.gitignore is_file=T has_next_sib=T
GETTING_STARTED.md is_file=T has_next_sib=T
LICENSE is_file=T has_next_sib=T
PROJECT_SUMMARY.md is_file=T has_next_sib=T
QUICKSTART.md is_file=T has_next_sib=T
README.md is_file=T has_next_sib=T
SNIFFLY_MASTER_PLAN.md is_file=T has_next_sib=T
TECHNICAL_STACK.md is_file=T has_next_sib=T
meson.build is_file=T has_next_sib=F