Review "Write maintainable, reusable and evolutionary code" and "Well managed code" principles' scope

[jeff-horton-ho-sas]

Which content do you think should be reviewed?
https://engineering.homeoffice.gov.uk/principles/well-managed-code/
https://engineering.homeoffice.gov.uk/principles/write-maintainable-reusable-and-evolutionary-code/

Why do you think we should review this?
From discussion in the software design guild, with input from members from other guilds these are too specific due to only talking about code. We felt that some upcoming principles over lap with these and are more generally applicable.

Do you have a suggestion for how this could be improved?
Incorporate the rationale and implications into #504, #499. If they can't cover the existing content, identify a more general principle that covers those points more generally.

Please confirm the below

• I have checked through the issues on the repository and don't think this has already been suggested