Use the new animation option type

[ammen99]

This PR updates the plugins to use the new animation option type from wf-config.

Note that there are no breaking changes, because the old way to use animations (integer duration option) still works.
Plugins which want to be more configurable have to update their code to use the new option type (which is very simple in most cases).

In any case, this change makes it possible to be a bit more explicit in the config file, for example 200ms or 2.5s, both are accepted.
For backwards compatibility, the user can also just write a simple number, 200 as before, which is interpreted as 200ms.

Also, the animation easing function is now configurable if one uses the full format. For example, 200ms linear or 200ms circle. The default easing function was and remains circle, but sometimes sigmoid or linear might look better. Also for fun one can use easeOutElastic. We can also add more functions to wf-config, if desired.