Feature errorFieldOnly option in zod catch

[TakhyunKim]

Feature

hello. I'm really using your library very well.
I write them because I use catch and there is a feature that I think would be nice to have in zod.
I would be grateful if you could take a look at it.

If the ZOD schema validation fails, it would be nice to have an option in the catch to update only the failed fields.
The example code and expected results are shown below.

import { z } from 'zod';

const errorTestValue = {
  title: 'title with error',
  contents: 'contents with error',
};

export const testSchema = z
  .object({
    title: z.string(),
    contents: z.string(),
  })
  .catch(errorTestValue, { errorFieldOnly: true }); // Provide the errorFieldOnly option

const wrongMockData = { title: 123, contents: 'success' };

const wrongValue = testSchema.parse(wrongMockData); // { title: 'title with error', contents: 'success' }

Why I needed this feature

The purpose is to update only the failed fields when schema validation fails, as described above.
The existing code for this is shown below.
I've applied a catch for each field in the object.

export const testSchema = z
  .object({
    title: z.string().catch('title with error'),
    contents: z.string().catch('contents with error'),
  });

Right now we only have two fields, title and contents,
but we actually have quite a few fields, so it wasn't easy to set this up.
I'd declare some sort of default value separately and approach it as follows.

const errorTestValue = {
  title: 'title with error',
  contents: 'contents with error',
};

export const testSchema = z.object({
  title: z.string().catch(errorTestValue.title),
  contents: z.string().catch(errorTestValue.contents),
});

errorOnlyField would be really useful.

Note

If you provide the errorOnlyField as an optional type and default to false, you can use the
I think we can guarantee the existing catch behaviour.