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.sh

@@ -0,0 +1,49 @@
+#!/usr/bin/env bash
+set -e
+
+echo "============================================================"
+echo " SRT Streamer - Setup (Linux/macOS)"
+echo "============================================================"
+echo ""
+
+# Check Node.js
+if ! command -v node &>/dev/null; then
+    echo "[ERROR] Node.js not found! Install from https://nodejs.org"
+    exit 1
+fi
+
+# Check FFmpeg
+mkdir -p ffmpeg-bin
+
+if command -v ffmpeg &>/dev/null; then
+    echo "[OK] FFmpeg found: $(which ffmpeg)"
+    cp "$(which ffmpeg)" ffmpeg-bin/ffmpeg
+    chmod +x ffmpeg-bin/ffmpeg
+    echo "Copied to ffmpeg-bin/"
+else
+    echo "[WARNING] FFmpeg not found in PATH."
+    echo ""
+    if [[ "$OSTYPE" == "darwin"* ]]; then
+        echo "Install via Homebrew:  brew install ffmpeg"
+    else
+        echo "Install via apt:       sudo apt install ffmpeg"
+        echo "Or download from:      https://ffmpeg.org/download.html"
+    fi
+    echo ""
+    echo "After installing FFmpeg, copy the binary to ffmpeg-bin/ffmpeg"
+fi
+
+echo ""
+echo "Installing npm dependencies..."
+npm install
+
+echo ""
+echo "Generating icons..."
+node assets/create-placeholder-icons.js || true
+
+echo ""
+echo "============================================================"
+echo " Setup complete!"
+echo " Run:  npm run dev       (development mode)"
+echo " Run:  npm run build     (build app)"
+echo "============================================================"