Add type coercion support to drizzle-zod

[L-Mario564]

Addresses #3842 & #776.

This PR adds support for type coercion in schemas automatically generated with drizzle-zod.

Type coercion is disabled by default. We can configure it using the createSchemaFactory function:

const users = pgTable('users', {
  id: serial().primaryKey(),
  createdAt: timestamp().notNull().defaultNow()
});

// This configuration will only coerce dates
const { createSelectSchema } = createSchemaFactory({
  coerce: {
    date: true
  }
});

/*
  Same as:
  const selectUserSchema = z.object({
    id: z.number().min(...).max(...).int(),
    createdAt: z.coerce.date()
  });
*/
const selectUserSchema = createSelectSchema(users);

Docs: drizzle-team/drizzle-orm-docs#470.

[cybercoder-naj]

Any updates on this PR? I'm looking forward to this feature soon.