Revit_Toolkit: Implement tag-based filtering on Pull

#### Description:

`FilterRequest` has `Tag` property that allows filtering the objects to pull based on tags assigned to them. This is currently not supported in Revit_Toolkit, would be a nice to have - this, however, will probably require passing tag parameter name to `ElementIds` method, which I am not sure if is a good idea. TBC.

Workaround possible using `ParameterTextRequest`.