Changes

This PR updates the Drizzle integration documentation to follow proper Drizzle ORM patterns and best practices.

What this PR improves:

• Schema-first approach: Shows proper schema definition using sqliteTable
• Migration workflow: Demonstrates drizzle-kit usage for schema management
• Type safety: Full TypeScript integration with inferred types
• Complete example: End-to-end workflow from schema to queries
• Configuration: Includes necessary drizzle.config.ts setup

Key additions:

• Proper schema definition example
• Migration commands and workflow
• Typed query examples
• Configuration file example
• Clear benefits explanation

The new example provides a much better foundation for developers to understand how to properly integrate db0 with Drizzle ORM, following established Drizzle patterns rather than working against them.

Fixes #[169]