Added a function to use positionCameraToWorld for the player's position....

... Only works on the player since it uses camera position which is local to each machine.

Should entirely close https://github.com/michail-nikolaev/task-force-arma-3-radio/issues/487
TF_fnc_position gets called from [preparePositionCoordinates](https://github.com/michail-nikolaev/task-force-arma-3-radio/blob/master/arma3/%40task_force_radio/addons/task_force_radio/functions/fn_preparePositionCoordinates.sqf#L24)