Add: Refactor requirements doc

[suspect15]

Adds a requirements doc for refactored inactive developer sets. The purpose of this is to establish a standard for bringing substandard, inactive developer sets up to current quality standards to ensure long term stability and easiest possible future maintenance.

[greptile-apps]

Greptile Summary

Adds refactoring requirements and English sidebar navigation.

• Defines standards for code notes, logic, writing, and Rich Presence.
• Removes premature save-state submission guidance.

Confidence Score: 5/5

The PR appears safe to merge.

No actionable new issues remain. The missing save-state instructions were removed. suspect15 accepted the deliberate heading hierarchy as appropriate.

_{Reviews (2): Last reviewed commit: "removed save repo verbiage" | Re-trigger Greptile}