add GStreamer helper scripts

scripts/set_pipeline_mjpeg.sh

@@ -0,0 +1,12 @@
+#!/bin/bash
+# Set pipeline for MJPEG HTTP streaming
+
+SOCKET="/tmp/vizion_control.sock"
+PORT="${1:-8080}"
+
+echo "Setting MJPEG HTTP streaming pipeline on port $PORT..."
+echo "{\"command\":\"set_pipeline\",\"params\":{\"pipeline\":\"videoconvert ! jpegenc ! multipartmux ! tcpserversink host=0.0.0.0 port=$PORT\"}}" | socat - UNIX-CONNECT:$SOCKET
+
+echo ""
+echo "Pipeline set. Start streaming with start_stream.sh"
+echo "View stream in browser: http://localhost:$PORT"