Add FARFilter Support

[osstony]

Add FARFilter Support

[rdeioris]

Added a couple of comments. I Think it is better to move the assets management sections from here https://github.com/20tab/UnrealEnginePython/blob/master/docs/PythonConsole.md to a dedicated doc files including the farfilter api.

[osstony]

My initial instinct is to use python types for the containers and push their contents to the filter properties when necessary.

[rdeioris]

I think you can check UEPyVector on how to add new types with properties and methods. For TArray use lists, TSet and TMultiMap should map easily to dictionaries

[osstony]

That's the approach I took and it seems to be working well. We may want to use a defaultdict(set) for the TMultiMap to better mimic the functionality of the Unreal type.

[osstony]

I did end up going with a defaultdict(set) to better emulate TMultiMap.

[rdeioris]

...and add your credits to the CONTRIBUTORS file :)

[osstony]

This has been merged, closing for now