docs(tools): Add LutrisToSunshine (#53)

Author: Arbitrate3280

README.md

@@ -39,6 +39,7 @@
 ## 🛠️ Tools
 - [Cloudy Pad](https://github.com/PierreBeucher/cloudypad) - Deploy Sunshine in the Cloud: Paperspace, AWS, Azure, Google Cloud, and more.
 - [GSMS](https://github.com/LizardByte/GSMS) - Migrate games and apps from GeForce Experience to Sunshine.
+- [LutrisToSunshine](https://github.com/Arbitrate3280/LutrisToSunshine) - This script lists games from Lutris, Heroic and/or Bottles, adds them to Sunshine, and optionally downloads game covers from SteamGridDB. 
 - [NeonSunshine](https://github.com/NeonLightning/NeonSunshine) - Add and sort games with cover art downloading from SteamGridDB.
 - [SunshineGameFinder](https://github.com/JMTK/SunshineGameFinder) - Adds games from common game install paths to Sunshine.
 - [sunshine_utils](https://github.com/designer-living/sunshine_utils) - Utilities for using with Sunshine / Moonlight / Playnite game streaming.