fix(main) add pjlink tester sample

pjlinktest.sh

@@ -0,0 +1,24 @@
+#!/bin/bash
+
+# IP and port of the projector
+IP="192.168.45.185"
+PORT="4352"
+COMMAND="%1POWR ?"
+
+# Loop 100 times
+for i in {1..100}; do
+  echo "Attempt $i:"
+
+  # Send the command and capture the response
+  RESPONSE=$(echo "$COMMAND" | nc -w 1 $IP $PORT)
+
+  # Check if the response is non-empty
+  if [ -n "$RESPONSE" ]; then
+    echo "Response received: $RESPONSE"
+  else
+    echo "No response received."
+  fi
+
+  # Optional: Add a delay if needed (e.g., 1 second)
+  #sleep 1
+done