Add one-command install script and stability fixes

- Add install.sh for automated setup
- Add all component files (wrapper, service, config, verify)
- Add stability fixes section (WiFi PowerSave disable + Watchdog)
- Update README with new installation instructions

01-prerequisites.md

@@ -0,0 +1,32 @@
+# Prerequisites
+
+## System Requirements
+
+**Fresh Raspberry Pi OS (Lite/Bookworm recommended)**
+
+The installation script will automatically install the required packages, but if you prefer manual installation:
+
+```bash
+sudo apt update && sudo apt upgrade -y
+sudo apt install darkice icecast2 alsa-utils -y
+sudo reboot
+```
+
+## Hardware Requirements
+
+- Raspberry Pi (any model, including Pi Zero 2W)
+- USB audio interface (record player → RCA/3.5mm → USB)
+- Reliable power supply (USB audio hates undervoltage - use a quality power adapter)
+- Network connection (WiFi or Ethernet)
+
+## Software Requirements
+
+- Raspberry Pi OS (Debian-based)
+- Git (usually pre-installed)
+- Sudo access
+
+## Notes
+
+- The Pi Zero 2W works great for this setup
+- USB audio disconnections are fixed by the wrapper script and USB audio configuration
+- A stable power supply is critical - undervoltage causes USB audio issues