docs: update english version

[Groupguanfang]

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[Copilot]

Pull Request Overview

This PR updates the English documentation for unioc by adding new content pages and refreshing existing materials to better serve English-speaking users.

• Added new documentation pages for Web, Getting Started, Nest.js Integration, Midway Integration, Database integrations (TypeORM, Prisma, Drizzle), and Cell.js Integration.
• Enhanced the core documentation with detailed content for Plugin Development and Decorator Factory.
• Updated the site configuration to include an English sidebar and language-specific settings.

Reviewed Changes

Copilot reviewed 12 out of 12 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
docs/content/en/web/index.md	New and comprehensive documentation for the Web section and Restful APIs.
docs/content/en/start.md	Added a Getting Started guide with architecture diagrams.
docs/content/en/nestjs.md	Detailed instructions for Nest.js integration with unioc.
docs/content/en/midway.md	Brief documentation page for Midway integration.
docs/content/en/index.md	Updated homepage content for the English documentation.
docs/content/en/database/typeorm.md	New documentation page for TypeORM integration.
docs/content/en/database/prisma.md	New documentation page for Prisma integration.
docs/content/en/database/drizzle.md	New documentation page for Drizzle integration.
docs/content/en/core/plugin.md	Detailed guide for Plugin Development in unioc.
docs/content/en/core/decorator-factory.md	Documentation for the Decorator Factory and compatibility details.
docs/content/en/cell.md	New documentation page for Cell.js integration.
docs/.vitepress/config.ts	Updated site configuration to support English docs with a tailored sidebar.