Scaffold ewa-ui component library

[vickystickz]

Description

Scaffold the @spatialnode/ewa-ui React component library repo so it's ready for component development: build tooling, Storybook, and an automated release pipeline.

Tasks

• Initialize the library project (build config, TypeScript, package metadata)
• Set up Storybook, remove default boilerplate stories/assets, enable autodocs
• Add a GitHub Actions release workflow (typecheck, test, build, publish to npm with provenance)
• Set initial npm package version to 0.1.0 (pre-1.0, API not yet stable)
• Document the CI-driven release process in the README

Acceptance criteria

• pnpm build produces ESM/CJS output with type declarations
• Storybook runs cleanly with no leftover default-template stories
• Tagging a GitHub Release triggers .github/workflows/release.yml, which verifies the tag matches package.json and publishes to npm
• README accurately describes how to cut a release (no stale manual npm publish instructions)