Define code review

[ChrisBeeley]

It may be useful to have a formal definition of code review. Here are some links I stole from the ever helpful Jess Morley.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9367192/
https://academic.oup.com/aje/article/190/10/2172/6218064?login=false
https://google.github.io/eng-practices/review/reviewer/

@tomjemmett may find this issue interesting

[ChrisBeeley]

Another link from the also ever helpful Jonny Pearson

https://best-practice-and-impact.github.io/qa-of-code-guidance/checklists.html

[Lextuga007]

Best placed in this section perhaps where I've started to expand on review as interpreted from the NHSx Open policy and code review with the new book from Posit.