Wiki Translation to Swift

@danielgindi - Daniel, would you mind if I translate the official wiki documentation from Android to Swift so it can be used in this repo? I know it claims to be 95% the same as the Android version but that's really not true. On several occasions I've searched for hours to find something the Android docs say to look for but it's not in the Swift code.

Translating it would not only help me become more familiar with the APIs but also help others looking in this repo for help.

Let me know.

Start by reviewing the official Android wiki alongside the Swift APIs in this repository, noting where the documentation does not match the Swift code. Define the translation scope before proceeding. Done means the relevant wiki documentation has been translated for Swift and reflects the APIs available in this repo.

Written by the indexing model from the issue text.