Create WiiReaction.oscmeta

[KyleWii]

• [✓] Have you checked that there aren't other open pull requests for the same manifest update/change?
• [✓] Have you verified that the manifest contains valid JSON?
• [✓] Are you certain that this manifest is not designed to obtain copyrighted material or software, which you do not have permission to distribute?
• [✓] Submitting malicious software is strictly forbidden, and potentially constitutes criminal activity, punishable by law. To the best of your knowledge, is this submission clear of any malicious intent?

Note: filename.oscmeta is the slug of the application you are submitting. This slug is used to locate files such as "/apps/slug/boot.dol" and "/apps/slug/meta.xml" in the final archive generated by this manifest. These files should be available at this location.

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WiiReaction is a Nintendo Wii game for reaction tests. If i did this incorrectly, please tell me and i'll fix it. I'm new to GitHub.