Add method-hints from Faker\Generator to the Facade

[simonberger]

I wanted to somehow fix the non resolving method calls from the facade since a longer time.
While Faker itself also has no true methods in its Generator, they solve it with @property and @method annotations which works well enough.
I first tried to somehow "inherit" the methods from the faker generator to the facade but that would never work in all IDEs and static analyzers and is probably impossible because of the static <-> non static difference.

What I did was getting the method and property annotation block from Faker\Generator and process the following 4 steps on it:

1. Copy the whole property + method annotation block
2. Replace @method with @method static
3. Remove all @property and empty lines
4. Align method names

[simonberger]

@GrahamCampbell sorry for mentioning, but I doubt this project is really checked.
It would be great this fix could make it in.