Add lint, format and type checks and basic tests. Update code style and fix CI.

[goanpeca]

No description provided.

[Copilot]

Pull Request Overview

This PR updates the Storybook infrastructure to use the latest version, modernizes MDX import paths, and adds comprehensive testing capabilities. The changes focus on migrating from Storybook 9.0.0-alpha to 9.1.2 stable while adding automated testing for both stories and documentation pages.

Key changes include:

• Upgrade to Storybook 9.1.2 with simplified addon configuration
• Update all MDX files to use the correct import path for Storybook blocks
• Add test runner configuration and custom test scripts for MDX documentation validation
• Create mock components to prevent kernel startup issues in test environments

Reviewed Changes

Copilot reviewed 45 out of 46 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
storybook/package.json	Updates Storybook dependencies to v9.1.2 and adds test runner capabilities
storybook/.storybook/main.ts	Simplifies addon configuration by replacing essentials with docs addon
storybook/src/stories/*.mdx	Updates import paths from @storybook/blocks to @storybook/addon-docs/blocks
storybook/test-storybook.js	Adds custom Playwright-based test for MDX documentation rendering
storybook/test-runner-jest.config.js	Configures Jest test runner for Storybook tests
storybook/src/stories/RichEditorMock.tsx	Creates mock component to avoid kernel startup in test environments

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[echarles]

LGTM Thx @goanpeca