Add distance-based squad radio for realistic communication and tactical immersion

Description:
Currently, in-game voice chat lacks distance-based realism — players can clearly hear each other even from far away.
I propose adding a distance-based squad radio system that simulates realistic communication limits and environmental effects.

This would:

Enhance immersion and realism during tactical operations

Prevent unfair information sharing across the entire map

Encourage use of radios, relays, and team positioning as strategy

By introducing range-limited communication, every encounter becomes more authentic and strategic — creating a more natural and fair battlefield experience.