Add Selenium downloadFile command

[ccharnkij]

Proposed changes

#12778 but for main branch.

Types of changes

• Polish (an improvement for an existing feature)
• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update (improvements to the project's docs)
• Specification changes (updates to WebDriver command specifications)
• Internal updates (everything related to internal scripts, governance documentation and CI files)

Checklist

• I have read the CONTRIBUTING doc
• I have added tests that prove my fix is effective or that my feature works
• I have added the necessary documentation (if appropriate)
• I have added proper type definitions for new commands (if appropriate)

Reviewers: @webdriverio/project-committers

[christian-bromann]

This is awesome!

Thanks a lot 👍

[wdio-bot]

Hey ccharnkij 👋

Thank you for your contribution to WebdriverIO! Your pull request has been marked as an "Expensable" contribution. We've sent you an email with further instructions on how to claim your expenses from our development fund. Please make sure to check your spam folder as well. If you have any questions, feel free to reach out to us at [email protected] or in the contributing channel on Discord.

We are looking forward to more contributions from you in the future 🙌

Have a nice day,
The WebdriverIO Team 🤖