Update README, add Soundboard section, planned Global Hotkey notice

Author: DEVCodeWithAI

README.md

@@ -5,6 +5,12 @@
 > Built with the assistance of AI (Gemini + ChatGPT)  
 
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+## 🖥️ Screenshot
+![idolLiveAudio](Resources/SplashScreen.png)
+
+![idolLiveAudio Main Interface](docs/images/screenshot_main.png)
+
+Lightweight, intuitive interface for managing plugins and soundboard during your live performances.
 
 ## 🚀 Key Features
 ✅ Supports Waves, Antares Auto-Tune Pro - Auto-key, and VST3 plugins