Add ITD as a companion app

Author: Elara6331

README.md

@@ -16,6 +16,7 @@ Fast open-source firmware for the [PineTime smartwatch](https://www.pine64.org/p
  - [AmazFish](https://openrepos.net/content/piggz/amazfish/) (SailfishOS)
  - [Siglo](https://github.com/alexr4535/siglo) (Linux)
  - [InfiniLink](https://github.com/xan-m/InfiniLink) **[Experimental]** (iOS)
+ - [ITD](https://gitea.arsenm.dev/Arsen6331/itd) (Linux)
 
 ## Development