src
Repo src holds some source code by hkjn.
Submodules
Some directories hold source code from separate repos outside of src/,
which can be initialized with:
git submodule init
git submodule update
These repos were added like:
git submodule add https://github.com/hkjn/probes
The submodule repos can be updated like:
git submodule update --remote probes