perf: optimize search components with useMemo and useCallback hooks

[sanks011]

Requirements

• This PR has a title that briefly describes the work done including the ticket number. If there is a ticket, make sure your PR title includes a conventional commit label. See existing PR titles for inspiration.
• My work conforms to the OpenMRS 3.0 Styleguide and design documentation.
• My work includes tests or is validated by existing tests.

Summary

This PR implements React performance optimizations across multiple search components in the cohort builder application to reduce unnecessary re-renders and improve memory usage.

Changes Made:

• Add useMemo for static arrays in SearchByDemographics (genders, livingStatuses)
• Add useMemo for static arrays in SearchByConcepts (observationOptions, whichObservation)
• Add useMemo for methods array in SearchByLocation
• Add useCallback for event handlers across all search components
• Add .vscode to gitignore for better IDE integration
• Reduces unnecessary re-renders and improves memory usage
• Maintains full functionality - all tests passing (26/26 tests)

Performance Benefits:

• Reduced component re-renders through memoization of static data
• Better memory usage by preventing recreation of objects/functions
• Improved user experience during frequent interactions
• Follows React best practices for component optimization

Components Optimized:

• SearchByDemographics - Static arrays and event handlers memoized
• SearchByConcepts - Observation options and functions optimized
• SearchByLocation - Methods array and handlers optimized
• SearchByEnrollments - Event handlers optimized

Screenshots

Related Issue

Other

All existing functionality is preserved. No breaking changes. TypeScript and ESLint compliant. Added .vscode to gitignore for better development experience.