[ENG-46310] feat(webkit): add clickable prop and click event to Chip

[HerbertJulio]

Summary

Adds an opt-in interactive mode to Chip so the chip body can be clicked.

• New prop clickable (default false). When set, the chip body becomes interactive: role="button", tabindex="0", cursor-pointer, a hover/active ghost-layer overlay (--bg-hover / --bg-active), and a focus-visible ring.
• New event click (MouseEvent | KeyboardEvent). Fires on pointer click, or Enter / Space while the chip root is focused.
• clickable and removable compose: the remove button stops propagation, so activating × emits remove only — never click. Keystrokes originating on the remove button do not trigger the chip's activation.
• With clickable off, the chip is unchanged (non-interactive).

Spec (.specs/chip.md), the Storybook story (new Clickable story), and the component are updated 1-to-1; the spec checksum was recomputed.

Notes

• Version bump: minor (feat, additive — no breaking change to the existing API).
• eslint.config.js: added KeyboardEvent to the browser globals — first use in the codebase, required by the new click payload type. The repo enumerates DOM globals as components need them (e.g. MouseEvent was already listed); without it no-undef fails lint.
• No new runtime dependencies; hover/active uses the canonical CSS ghost-layer pattern from DESIGN.md (no animation/positioning lib).
• Relates to ENG-46310.

[robsongajunior]

Should be added click point and style of chip component.