add GStreamer helper scripts

scripts/get_formats.sh

@@ -0,0 +1,6 @@
+#!/bin/bash
+# Get available camera formats
+
+SOCKET="/tmp/vizion_control.sock"
+
+echo '{"command":"get_formats"}' | socat - UNIX-CONNECT:$SOCKET | python3 -m json.tool 2>/dev/null || echo '{"command":"get_formats"}' | socat - UNIX-CONNECT:$SOCKET