Pre-check

• I'm aware that I can edit the docs and submit a pull request

Describe the improvement

I'd like to report

• Unclear documentation
• A typo
• Missing documentation
• Other

Description of the improvement / report

I created a repository where I tried to reproduce the problems I found, when setting up visual testing: https://github.com/htho/wdio-repro-visual-service

TypeScript can't tell, what type to expect for the configuration object for visual.
This could be improved, so we have IntelliSense when editing the object.

https://github.com/htho/wdio-repro-visual-service/blob/main/wdio-default.conf.ts#L11-L20

services: [
    [
        "visual",
        {
            // no automatic type information
            // therefore the `satisfies VisualServiceOptions` below.
            // TODO: REPORT
        } satisfies VisualServiceOptions,
    ],
],

To fix this I added satisfies VisualServiceOptions.

I gather the type like this, because VisualServiceOptions is not exported.

https://github.com/htho/wdio-repro-visual-service/blob/main/wdio-default.conf.ts#L2-L7

import type { ClassOptions } from 'webdriver-image-comparison';

// should be exported
// TODO: REPORT
// https://github.com/webdriverio/visual-testing/blob/f4d9e654a746d09e9ca2567ffe69200c161cc14b/packages/visual-service/src/types.ts#L62
type VisualServiceOptions = ClassOptions;

To improve Documentation/DX, VisualServiceOptions should be available for import.
Also there should be type information, about the config object for visual