Flexible radar circuit interface.

• Read space platforms status and requests to better control your rocket silos.
  Read platform status like current orbited planet or current space connection, current speed and progress along space connection.
  Can read unfulfilled requests for custom rocket loading or raw requests, items on the way via cargo pod and platform hub inventory seperately.
  Implemented using hidden combinators for almost zero on_tick cost.
  Note that this means signals are 1 or 2 ticks delayed in platforms mode.

• Send signals across surface via named channels, or enable interplanetary connection.
  Re-implements the default vanilla behavior where radars connect their circuit networks to each other across the surface.
  This mods lets you restrict communication to named channels and has a setting to allow selected channels to transmit interplanetary.
  Note that this has no tick cost or signal delay.

Planning to add features like reading entity counts in radar range, for example to detect enemies.

Suggestions welcome.

changelog:
v0.1.1: fixed error if custom gui from other mods is opened