Adhaan

It is a Rust library for calculating prayer times. It originally started as a fork of salah, which I and have been using for making a GUI and [Azzam S.A.] was using to make a TUI, but has been causing us lots of pain.

salah was ported to Rust by Farhan Ahmed from Adhan by BatoulApps. May Allah grant him bountiful rewards.

Key differences between salah and adhaan are:

1. adhaan extensible in regard of calculation method.
2. adhaan uses jiff for its date-time vocabulary, in stead of chrono.

Motivation for this arose when I started to work on [AdhaanGUI] and although whereas AdhaanGUI itself is on hiatus, I use both adhaan and AdhaanGUI frequently.