2021-09-30: Define `debug` and `debugger`

[ashwinvis]

The term appears in Glosario:

• https://glosario.carpentries.org/en/#repl
• https://glosario.carpentries.org/en/#multi_threaded

and also as an episode

• https://swcarpentry.github.io/python-novice-inflammation/11-debugging/index.html

However thinking as someone unfamiliar with the process of debugging, these are new terms to understand.

[sfmig]

"Debug" seems to be in the glossary now so I think this issue can be closed - I added some crosslinks to it in PR #760 and also added its definition to the python-novice-inflammation glossary in this PR

[elletjies]

@all-contributors please add @ashwinvis question

[allcontributors]

@elletjies

I've put up a pull request to add @ashwinvis! 🎉

[elletjies]

@all-contributors please add @sfmig question

[allcontributors]

@elletjies

I've put up a pull request to add @sfmig! 🎉

[elletjies]

@all-contributors please add @kozo2 question