zod-dbs MongoDB Provider

MongoDB provider for zod-dbs, a tool that generates Zod schemas from database schemas. Version 1.0.5 requires `mongodb` (>=5) peer dependency. It introspects a MongoDB database (sampling documents) to infer schema types and generate type-safe Zod validation schemas. Key differentiator: works with existing MongoDB databases to produce TypeScript-first schemas without manual definition. Release cadence is low; the package is in early stages. Enum types are not yet supported.