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>

setup.bat

@@ -0,0 +1,61 @@
+@echo off
+echo ============================================================
+echo  SRT Streamer - Setup
+echo ============================================================
+echo.
+
+:: Check Node.js
+where node >nul 2>&1
+if %errorlevel% neq 0 (
+    echo [ERROR] Node.js not found! Please install from https://nodejs.org
+    pause
+    exit /b 1
+)
+
+:: Check FFmpeg
+echo Checking FFmpeg...
+where ffmpeg >nul 2>&1
+if %errorlevel% neq 0 (
+    echo [WARNING] FFmpeg not found in system PATH.
+    echo.
+    echo Please place ffmpeg.exe in the ffmpeg-bin\ folder.
+    echo Download FFmpeg with SRT support from:
+    echo   https://github.com/BtbN/FFmpeg-Builds/releases
+    echo   (download ffmpeg-master-latest-win64-gpl.zip)
+    echo.
+    mkdir ffmpeg-bin 2>nul
+    echo After placing ffmpeg.exe in ffmpeg-bin\, run this setup again.
+) else (
+    echo [OK] FFmpeg found in system PATH.
+    echo.
+    echo Copying FFmpeg to ffmpeg-bin\...
+    mkdir ffmpeg-bin 2>nul
+    for /f "tokens=*" %%i in ('where ffmpeg') do (
+        copy "%%i" "ffmpeg-bin\ffmpeg.exe" >nul 2>&1
+        echo Copied: %%i
+        goto :ffmpeg_done
+    )
+    :ffmpeg_done
+)
+
+echo.
+echo Installing dependencies...
+call npm install
+if %errorlevel% neq 0 (
+    echo [ERROR] npm install failed!
+    pause
+    exit /b 1
+)
+
+echo.
+echo Generating icons...
+node assets/create-placeholder-icons.js
+
+echo.
+echo ============================================================
+echo  Setup complete!
+echo  Run:  npm run dev    (development mode)
+echo  Run:  npm run build  (build portable .exe)
+echo ============================================================
+echo.
+pause