feat: initial release — SRT Streamer v1.0.0

Cross-platform Electron + React + FFmpeg desktop app for sending
multiple SRT streams simultaneously.

Features:
- Multiple simultaneous SRT output streams
- Video sources: desktop, window capture, cameras, capture cards
- Audio sources: microphones, system loopback, sound cards
- H.264 encoding with HW acceleration (NVENC/QSV/AMF/VideoToolbox)
- SRT modes: caller / listener / rendezvous
- Frame profile presets (4K, 1080p, 720p, 480p, 360p)
- Tolbek SRT receiver with configurable mode
- System tray: minimize-to-tray, exit confirmation dialog
- Portable build via electron-builder

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

start.bat

@@ -0,0 +1,24 @@
+@echo off
+title SRT Streamer
+cd /d "%~dp0"
+
+:: Check node_modules
+if not exist "node_modules" (
+    echo [INFO] Dependencies not installed. Running setup...
+    echo.
+    call setup.bat
+)
+
+:: Check ffmpeg-bin
+if not exist "ffmpeg-bin\ffmpeg.exe" (
+    echo [WARNING] ffmpeg.exe not found in ffmpeg-bin\
+    echo.
+    echo Place ffmpeg.exe in the ffmpeg-bin\ folder and restart.
+    echo Download: https://github.com/BtbN/FFmpeg-Builds/releases
+    echo.
+    pause
+    exit /b 1
+)
+
+echo Starting SRT Streamer...
+npm run dev