bidirectional portals

[Fusselwurm]

portal from base to arena is now bidirectional in every imaginable sense:

• players can go from base to arena and from arena to base
• players can use the portal from any direction
• players will exit the portal with the same relative direction as they entered it

removed the portal that previously led back to base

note: the magic hidden here [portal_base, portal_arena] call grad_portal_fnc_setUpPortal;

• allows the portals to be moved and turned freely without adjusting the scripts
• currently only works with the one kind of portal we're using

https://youtu.be/Q8YsMA9n-KU

[Fusselwurm]

mit kjeld getestet, im discord nur daumen hoch.. ich merge mal kraft eigener arroganz