Add workflow tooling: claude2figma skills, Storybook addons, Figma permissions

Install @storybook/addon-designs for embedding Figma frames in stories
and claude2figma skills (preflight, component-rules, style-binding,
reference-interpreter) for enforcing design token compliance when
writing to Figma. Add PostToolUse hook for use_figma QA reminders and
pre-allow Figma MCP + Code Connect tools in settings.json.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

package.json

@@ -24,6 +24,7 @@
     "@chromatic-com/storybook": "^5.2.1",
     "@eslint/js": "^10.0.1",
     "@storybook/addon-a11y": "^10.4.0",
+    "@storybook/addon-designs": "^11.1.3",
     "@storybook/addon-docs": "^10.4.0",
     "@storybook/addon-mcp": "^0.6.0",
     "@storybook/addon-vitest": "^10.4.0",