Added new Opel Blitz block prop for decoration

Added new Flak 38 block prop for decoration

Added new Flak 38 vehicle entity

Added new VC tag to players chat messages if they are in Discord VC

Added missing fly-by map effects to several maps

Cleaned up audio effects for headshot impacts

Cleaned up audio effects for block impacts

Made improvements to bullet impact nose sound effect

Made improvements to how bullet impacts affect powerlines

Fixed bots being unable to open doors

Fixed bullet validation while in a vehicle

Fixed rendering, models and animations for all plane decorative blocks

Fixed Model 1935 being labelled as MG

Removed several unused sounds and textures