docs(guide): french translation (animations)

[lucille-d]

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[manekinekko]

@lucille-d je pense qu'il va falloir que tu fasse un rebase. De plus, tu dois garder le texte en anglais . Comme ici : https://github.com/angular/angular-cn/blob/master/public/docs/ts/latest/guide/animations.jade

[lucille-d]

Ok je fais ça.

[lucille-d]

C'est fait !