HEV/Radiation Charger Improvements

[ampreeT]

The current prop_hev_charger / prop_radiation_chargercharger implementation only charges the player's armor/gluon ammo but it does not play sounds or effects.

This will continue off the work done in #160.

Features to implement:

• CPropHevCharger and CPropRadiationCharger
  • Screen Space Overlay
    • The game controls this in the bool netprop m_bChargingPlayers but it plays the screen space overlay for all players
  • Play active charging sound when atleast one player is within radius
  • Apply laser effect on each player within the radius shown to all clients
• CPropRadiationCharger
  • Apply radiation effects on the gluon
    • Call CBlackMesaPlayer::SetRadiationChargeState on player entity

[Alienmario]

As for viewmodel or screenspace effects:

If they're particles, It may or may not be possible to send them individually via the DispatchEffect tempent (DispatchParticleEffect/StopParticleEffects).

Looking through github, I've found this example.