[FEATURE]: drizzle seed should support custom datatypes

[stefanprobst]

Feature hasn't been suggested before.

• I have verified this feature I'm about to request hasn't been suggested before.

Describe the enhancement you want to request

drizzle-seed should support seeding columns with custom dataypes - in my case, i have a bytea custom datatype (because postgres bytea is not yet natively supported by drizzle).

i had expected that i could just provide a custom refinement function for that column, like this:

await seed(db, schema).refine(() => {
  return {
    usersTable: {
      columns: {
        recoveryCode() {
          return Buffer.from(encryptString(generateRandomRecoveryCode()));
        },
      },
    },
  };
});

but that still throws with "Error: column with type bytea is not supported for now."