Add a system evolution section to pull requests

[audreyality]

🎟️ Tracking

N/A

📔 Objective

Extend the PR template with a "System Evolution" section that describes how the PR fits within a larger body of work.

⏰ Reminders before review

• Contributor guidelines followed
• All formatters and local linters executed and passed
• Written new unit and / or integration tests where applicable
• Protected functional changes with optionality (feature flags)
• Used internationalization (i18n) for all UI strings
• CI builds passed
• Communicated to DevOps any deployment requirements
• Updated any necessary documentation (Confluence, contributing docs) or informed the documentation team

🦮 Reviewer guidelines

• 👍 (:+1:) or similar for great changes
• 📝 (:memo:) or ℹ️ (:information_source:) for notes or general info
• ❓ (:question:) for questions
• 🤔 (:thinking:) or 💭 (:thought_balloon:) for more open inquiry that's not quite a confirmed issue and could potentially benefit from discussion
• 🎨 (:art:) for suggestions / improvements
• ❌ (:x:) or ⚠️ (:warning:) for more significant problems or concerns needing attention
• 🌱 (:seedling:) or ♻️ (:recycle:) for future improvements or indications of technical debt
• ⛏ (:pick:) for minor or nitpick changes

[github-actions]

Checkmarx One – Scan Summary & Details – 423859b9-8cc5-4d2b-8851-cb5330c032a9

Great job, no security vulnerabilities found in this Pull Request

[withinfocus]

Suggested change

	## 🦖 System Evolution
	## 🦖 Related Changes

One idea for a casual name. This lands more softly and is also more readable to me.