Logger generate file operation errors

[sarthou]

Due to asynchronous events (I think), we can enter into a situation where an operation on the file tries to be made while the file is not open.

To reproduce it, click anywhere multiple time, at a moment the robot will stop moving because of this issue.

[sarthou]

https://github.com/VictorB00/Simulation-Factory-Godot/blob/ad6c1c74aa4883f1a5b80381698e54d1a41e5d35/Scripts/Main.gd#L83-L91

Moreover, opening, seeking for the end, and closing a file each time you want to write a line is a too heavy job. You should rather only write once at the end or periodically by detaching a dedicated process for it.

[sarthou]

The fact that the robot is stuck is due to the battery (it is thus a wanted feature) and not the logger. Nevertheless, the logger generates an error at each event.

[VictorB00]

Changed the logger to save the text in a string and only write at the end (when the simulation is closed)

[VictorB00]

Removed the logging process from Main node to put it in a dedicated singleton which can be accessed from anywhere to log information, and automatically saves the data to file at a fixed interval