Add fantasy cow Momo

[evu725]

Add a Meadowhorn cow

[github-actions]

🧪 PR Validation Results for #11

✅ Check PR is going to correct repo passed!
✅ Check image path passed!
✅ Check image file exists passed!
❌ Image file is too large! Maximum allowed size is 200 KB. Please resize or compress it and update your PR.
✅ Check file naming convention passed!
❌ File cows/momo.json is not properly indented.
✅ Check line endings passed!

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❌ 5/7 passed. Please fix the issues above and update your PR.

[cla-assistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}

[github-actions]

🧪 PR Validation Results for #11

✅ Check PR is going to correct repo passed!
✅ Check image path passed!
✅ Check image file exists passed!
✅ Check image file size passed!
✅ Check file naming convention passed!
✅ Check proper indentation passed!
✅ Check line endings passed!

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✅ All tests passed! Nice work on your PR! 🎉