Portal Gun Turrets

The mod adds automated turrets that act as hazards inside test chambers:

• Sentry Turret - a standard turret that detects and fires on nearby players.
• Oracle Turret - a special variant that delivers dialogue/voice lines rather than acting purely as a weapon.
• Defective Turret - a malfunctioning turret, typically harmless, used for flavor.

Turrets can be toppled or knocked over, and they react to entities that move into their line of sight, making them useful as obstacles in player-built challenges.