Add locale-aware renderer-independent NumberInput

[woksin]

Summary

Add a Cratis-owned numeric input for applications that need locale formatting without exposing renderer implementation types. The standalone control and CommandForm adapter share one parsing, formatting, validation, accessibility, parts, and token contract.

Added

• Add a renderer-independent, locale-aware NumberInput and shared NumberInputField CommandForm adapter. (Add a locale-aware renderer-independent number input #175)

Fixed

• Keep full-field paste changes and commits in one browser event transaction so WebKit preserves onChange before onCommit. (Add a locale-aware renderer-independent number input #175)

Public contract

• NumberInput is controlled through number | null, takes its BCP 47 locale from CratisComponentsProvider with an optional per-control override, and supports grouping, fraction policy, bounds, stepping, prefixes, suffixes, native form semantics, descriptions, errors, and disabled/read-only/invalid states.
• Semantic changes use value-first onChange; onCommit reports blur, enter, paste, or step after any corresponding change. Controlled normalization is withheld from form submission until the owner accepts it.
• Stable typed parts and --cratis-number-input-* token aliases provide the styling contract. No React Aria or renderer-specific type is public.
• NumberInputField reuses the same primitive through Arc's CommandForm adapter seam. Non-null command properties retain the established clear/non-finite-to-zero policy without a second parser or formatter.

Verification

• The affected package CI, Storybook production build, and 6 focused specification files covering 35 tests passed.
• The 11 primary contract mutations were proven red and restored exactly; eight review-repair mutations extend the final bound run to 19/19 red with exact source restoration.
• The reviewed 144-row Chromium, Firefox, and WebKit browser/reflow/accessibility matrix passed; six final controlled-range and required-submit rows extend the bound evidence without replacing the reviewed matrix. It covers locale behavior, keyboard/focus, paste ordering, form submission, 200% text reflow, axe, computed contrast, accessibility trees, forced colors, reduced motion, and mobile browser profiles.
• Package preparation, archive contents, exports, API documentation, all 24 public TypeScript 6 subpaths, production/tree-shaking, strict packed-consumer typecheck/build, and renderer-adapter package checks passed.
• All 22 current Ada runtime configuration shapes typecheck against the packed candidate through the documented compatibility facade.

Limitations

• This PR does not migrate Ada, remove Ada's current Prime number-input island, or establish drop-in visual/product parity at Ada's 22 call sites.
• Visible step controls, mobile input-mode behavior, adornment accessibility associations, and incumbent callback-volume differences remain consumer review items.
• Browser accessibility trees, axe, computed contrast, and Playwright device profiles are automated evidence; no human-operated screen-reader session or physical-device run was performed.
• No performance claim is made.

[cratis-stagehand]

Build Fix Required

The "JavaScript Build" workflow is failing on this PR due to an outdated yarn lockfile entry. See issue #243 for details.

Quick fix: Remove the obsolete supports-color@npm:* entry (version 11.0.0) from yarn.lock. This entry is no longer needed by the current dependency tree.

The entry spans 7 lines and is located before the supports-color@npm:^7.1.0 entry. After removal, run yarn install --immutable to verify the fix.