DS-075: Add a design-system release checklist and change log

[IbrahimIjai]

Context

As shared tokens and components evolve, contributors need a predictable way to
document visual changes, migrations, accessibility impact, and breaking APIs.

Scope

• Add a design-system changelog with an initial baseline entry.
• Add a pull-request checklist for token or shared-component changes.
• Define Added, Changed, Deprecated, Removed, Fixed, and Accessibility sections.
• Document deprecation and migration-note expectations.

Acceptance criteria

• The checklist covers light/dark, keyboard, mobile, tests, screenshots, and API compatibility.
• Changelog format includes dates and links to relevant issues/PRs.
• Breaking changes require a migration note.
• Accessibility fixes are visible rather than buried under general fixes.
• Contribution documentation links to both artifacts.

Out of scope

• Automating package releases.
• Publishing the UI package to a public registry.

[JinadJay]

@JinadJay has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

kindly assign

ℹ️ Repo Maintainers: To accept this application, review their application or assign @JinadJay to this issue.

[numdinkushi]

@numdinkushi has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Hi, I would like to work on this issue

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[razeprasine]

@razeprasine has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Hi Maintainer, I can resolve this please let me

ℹ️ Repo Maintainers: To accept this application, review their application or assign @razeprasine to this issue.

[drips-wave]

Congratulations, @razeprasine! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on July 30, 2026.

🧑‍💻 @razeprasine: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

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[grantfox-oss]

🎉 This issue has been marked as completed on GrantFox!

@razeprasine's PR #508 was approved and merged by @IbrahimIjai.

🏆 @razeprasine: You earned 35 FoxPoints for this contribution! Your current tier: Explorer (869 total points). Track your full progress on GrantFox.

👏 Great work, @razeprasine! Keep contributing to SO4-Markets.