For question on how to use it please use stackoverflow, tags access-ef-provider and
Entity Framework 6.x Provider for Microsoft Access files.
It supports code first and db first (see documentation to enable it).
Now you can download the library using NuGet. Search for JetEntityFrameworkProvider
The NuGet version does not contain DbFirst libraries. Why? For DbFirst use, I should change machine.config and I don't want to destroy your counfiguration.