- Add Storybook config files (`main.ts`, `preview.ts`,
`vitest.setup.ts`) for Next.js + Vite - Add Storybook-related dev
dependencies and scripts - Add example stories and components (Button,
Header, Page) with tests - Add MDX docs page with project configuration
guidance - Update `.gitignore` to exclude Storybook output and logs

- Bump eslint to 9.34.0 and eslint-config-next to 15.5.1 - Add various
dev dependencies including @typescript-eslint packages - Modify
sandbox-template: update setup tasks and disable auto-start of Goose
Server - Replace .devcontainer config with updated devcontainer.json and
remove old config files - Adjust package.json scripts and dependencies
accordingly

- Add @storybook/test-runner@^0.23.0 to dependencies - Add
test-storybook script to package.json - Update package-lock.json with
new test-runner and related packages

Use these fixtures to test both remote and local pages in the same test.
Update playwright.config.ts to include new fixture defaults for
black-thursday project.

Include dotenv and openai dependencies and use them in tests to evaluate
ARIA snapshot translation quality with a threshold score.