Add Kakao Small Sans to Google Fonts

[on-the-heath]

This PR adds the Kakao Small Sans font with the required metadata files.

• Family name: Kakao Small Sans
• License: Open Font License (OFL-1.1)
• Files: METADATA.pb, OFL.txt, TTF font files

[google-cla]

Thanks for your pull request! It looks like this may be your first contribution to a Google open source project. Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

View this failed invocation of the CLA check for more information.

For the most up to date status, view the checks section at the bottom of the pull request.

[on-the-heath]

Hello, I have already signed the CLA for my previous PR (#9014) where I submitted Kakao Big Sans.

This PR (#9015) is part of the same project, adding Kakao Small Sans to Google Fonts. Since both submissions come from the same contributor and organization, could you please verify the CLA status for this PR as well?

Thank you!

[m4rc1e]

Thank you very much for the submission. It looks very nice!

I'm curious. Could you please answer the following questions:

• Is this font an original creation?
• Is the Latin original?

[on-the-heath]

Thank you for reviewing this submission. I'm very happy to contribute to Google Fonts.

Kakao Small Sans (as well as Kakao Big Sans) is an original typeface, with the Korean font designed by Fontrix Inc. and the Latin font designed by Bon Min.

This typeface was created as part of a project by Kakao Corp., and the copyright is fully owned by Kakao.

If you have any further questions, please feel free to ask.

[on-the-heath]

I reviewed the issue after seeing the failure in the "Run ftxvalidator on new/changed fonts" check.
It appears that the error was caused by an incorrect font filename in the METADATA.pb file.

Would it be okay for me to update the file and push the corrected version to this PR? Please let me know how to proceed.

Thank you in advance.

[on-the-heath]

It looks like the "hdiutil attach font_tools.dmg" step failed due to a missing file in the QA environment.
Could you confirm if this issue is related to the build system, or if there is something I need to change on my end?
Please let me know how to proceed.

Thanks,