Possible improvements to current naming scheme

[lbianchi-lbl]

While there's no urgent need to do so, we have discussed the possibility of considering alternatives to the naming scheme (and consequently notebook discovery and processing logic) currently being used.

Unless (or until) there are concrete plans to actually change something, the purpose of this issue is to brainstorm, collect, and document the various solutions being considered and their pros/cons evaluations.

[lbianchi-lbl]

To start things off: one disadvantage of the current scheme (based on the _src path stem prefix) is due to accidental "collisions" occurring if the snake_case path stem happens to contain a word that is lexically sorted somewhere between the set of suffixes being used.

In this example, the notebook having introduction_short as its path stem is sorted before the _src-suffixed version of the introduction notebook, preventing the set of related suffixed notebook files from being grouped together: