Add prioritized issue tracking document with work plans

[Copilot]

Closes: N/A (creates new resource for maintainers)

Description

Analyzed all 80 open issues and created OPEN_ISSUES_PRIORITY.md organizing them into actionable tiers with work estimates.

Priority Distribution:

• 🔴 Critical (10): Accessibility violations (WCAG, ARIA) blocking compliance
• 🟠 High (22): Core bugs affecting SSR, React Strict Mode, data handling
• 🟡 Medium (20): Feature requests (TypeScript improvements, controlled components)
• 🔵 Low (28): Infrastructure (CI/CD, docs, tooling)

Per Issue:

• Impact assessment
• Implementation steps
• Effort estimate (hours)
• Direct GitHub link

Recommendations:

1. Immediate: Fix accessibility blockers ([fix] Step indicator defines aria-label without role #3271, [fix] Code example for date input (memorable date) component has a hint id that is not associated with anything #3290, [fix] Tooltip - When you hover over an active tooltip, it does not stay open (WCAG 1.4.13) #3133)
2. Next: Core functionality bugs ([fix] Code example for date input (memorable date) component has preceding numbers that do not match the USWDS implementation or the example hint #3291, [fix] FileInput throws errors in reactStrictMode #3230, [fix] Language selector does not blur on selection or blur when configured with more than 2 languages #3170)
3. Then: High-value features ([feat] Make Alert headingLevel prop optional #3244, [feat] More strongly type the autocomplete HTML attribute #3237, [feat] Allow ComboBox to return JSX in its drop down options #3201)

Document enables sprint planning, effort estimation, and contributor onboarding. Prioritization weights accessibility compliance and user-facing bugs over infrastructure improvements.

Original prompt

Take a look at all the open issues and create a document in which they're placed in priority order, along with a quick plan for the work required to close each issue.

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