Request: Allow export/import of FaceEmo settings to a file

[lunetoiles]

It would be helpful to be able to export/import FaceEmo settings to a file. This would allow creating back ups of the FaceEmo settings outside of the Unity project. This would allow moving FfaceEmo settings between different Unity projects. This would help in troubleshooting and recovery in the case of FaceEmo bugs.

[suzuryg]

In terms of backup, FaceEmo has the feature to automatically generate an asset that records the facial expression settings each time when applied to the avatar. https://suzuryg.github.io/face-emo/docs/optional-functions/auto-backup/

This backup does not include AnimationClips, but if you export it as a unitypackage together with AnimationClips, you can reproduce the same facial expression settings in other projects.