add test for txe

.github/scripts/update_contract.sh

@@ -67,6 +67,15 @@ if [ $? -eq 0 ]; then
 
             echo "Comments removed from $file"
         done
+
+        # Add 'mod test;' to the top of main.nr
+        main_nr_file="$copy_to_file_path/src/main.nr"
+        if [ -f "$main_nr_file" ]; then
+            sed -i '1imod test;' "$main_nr_file"
+            echo "Added 'mod test;' to the top of main.nr"
+        else
+            echo "main.nr not found in $copy_to_file_path/src/"
+        fi
     else
         echo "Directory not found: $name_value"
     fi