feat(styles,react): add input text, label, helper text and field

[Gnuk]

What

First iteration of the input field from the Figma anatomy, reduced to the pure text field (leading/trailing icons, vertical separator and the counter/clear tag are deferred to later MRs).

Pattern Library (styles 0.0.8)

• input-text atom: native text field carrying the visual container (border, 4px radius, background), full width by default, focus and disabled states, -error (sets aria-invalid="true") and -success alternatives. Colors and proportions matched against the Figma design.
• label atom: names a form control through for/id.
• helper-text atom: contextual help or feedback message linked through aria-describedby, with -error/-success alternatives.
• field molecule: pure vertical composition (label, any form control, helper text); the caller wires for/id, aria-describedby and the variant. Ready to host textarea/select later.
• Docs follow the button.md structure (Alternatives/States/Accessibility) and render zones are spaced with the render-wrapper pattern used by buttons.

React (react 0.0.7)

• IpponInputText forwarding native input props, deriving aria-invalid from the error variant (overridable).
• IpponLabel, IpponHelperText, IpponField — behavior-free, wiring shown in Storybook stories.
• Unit tests cover CAP classes, prop forwarding and the accessible name/description chain.

Housekeeping

• Versions bumped, peerDependencies aligned, CHANGELOG entry added.
• .playwright-mcp/ added to .gitignore.

🤖 Generated with Claude Code

https://claude.ai/code/session_01ELAyEHAB3ZCu8DRRhrUYMd