feat(drizzle-zod): add a zod .meta to pgTable fields to add OpenAPI descriptions

[maelp]

It's nicer to be able to add a zod schema.meta({ description: "This is my OpenAPI description"}) directly on the pgTable (or any table) fields, so this allows createSelectSchema, createInsertSchema and createUpdateSchema to get the description for their schema

Then when using zod-openapi, we get a nice description of the API, directly from the table description!