feat: migrate select component to TypeScript

[devin-ai-integration]

Description

Migrates the entire select component from JavaScript to TypeScript. This includes all sub-modules:

• select/ - Core Select class component, InputWrapper, MenuWrapper, FilterableMenu, FilterInput, and utility helpers
• multi-select/ - MultiSelect, Menu, FilterableMenu, Input, SelectionList
• multi-select-option/ - MultiSelectOption with Checkbox
• multi-select-field/ - MultiSelectField class component with Field wrapper
• single-select/ - SingleSelect, Menu, FilterableMenu, Input, Selection
• single-select-option/ - SingleSelectOption with checkmark SVG
• single-select-field/ - SingleSelectField class component with Field wrapper
• simple-single-select/ - SimpleSingleSelect with keyboard navigation hooks, Menu with Popper/Layer, SelectedValue with combobox ARIA, OptionsList with IntersectionObserver
• simple-single-select-field/ - SimpleSingleSelectField with Field wrapper

Changes made:

• Renamed all .js source files to .ts/.tsx (40+ files)
• Removed all PropTypes imports and runtime prop type definitions
• Added TypeScript interfaces for all component props and exported them
• Typed class components with React.Component<Props, State>
• Added component-level tsconfig.json with ES2023 lib and node types
• Updated d2.config.js entry point from src/index.js to src/index.ts
• Updated package.json build script to include post-build rename and added typecheck script
• Updated all test file imports to reference .tsx/.ts extensions
• Updated all story file imports to reference .tsx/.ts extensions
• Updated jest.mock() paths in test files to reference new .tsx paths
• Added src/locales/index.d.ts type declaration for i18n module
• Preserved labelId prop on Field in SimpleSingleSelectField for correct aria-labelledby association

Verification:

• tsc --noEmit passes with zero errors
• eslint passes with zero errors
• yarn build succeeds (134 files renamed, 114 imports updated by post-build script)
• Unit tests: 9 test suites fail due to pre-existing dependency resolution issues (unbuilt sibling packages like @dhis2/ui-constants, @dhis2-ui/box). These same 9 failures exist on the base branch before the migration. The 1 test suite that can resolve its dependencies (debounce.spec.js) passes.

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Known issues

• None introduced by this PR. Pre-existing test failures due to unbuilt sibling package dependencies.

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Checklist

• API docs are generated
• Tests were added
• Storybook demos were added

Story and test files were not converted to TypeScript per migration guidelines - only their imports were updated to reference the new .tsx/.ts source files.

Link to Devin session: https://app.devin.ai/sessions/8a839787d0b845dd926f26d18c106875
Requested by: @eirikhaugstulen

[devin-ai-integration]

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