fix: added sleep to avoid TP freeze

[pucciland95]

Hi all :)

Issue

I tried loading the hello_world.script through the TCP server as the ReadMe explains.
However, as soon as I press play on a simple .urscript with just the External control URCap node, the Teach Pendant freezes.

Here the urscript:

NOTE: I did not try it with the real robot, but only with the URSim Docker image.

Proposed solution

I first noticed that removing the "Program Loop Forever" flag, the TP does not freeze and the log is correctly printed in the log window.
Therefore, I tried adding a simple 1-second sleep between the textmsg("test function") seems to solve the issue for me also when the "Program Loop Forever" flag is active.

Cheers

Niccolo