Intro improvements:

[Jabka666]

• Fixed decals disappearing after the intro sequence (just spawned them manually, but removed random generation for sync);
• Removed strange guard backward movement;
• Fixed gurads not shooting at the player if the music guard has been triggered;
• Cell door in the intro now closes, fixing a bug where the guards could get stuck in it;
• Fixed being able to walk/run while getting up from bed in the intro sequence;
• Lowered the cell number signs in the intro sequence;
• Added EntityParent for Class D Orientation Leaflet;
• Removed junk code (extra Hide/ShowEntity Light (also removed it from everywhere) and extra r\Objects;
• Fixed a bug where afro-american Class D didn't look at SCP-173 while entering the chamber too fast;
• Added warning console message (also added for endings);
• Fixed the EscortTerminated sound not working in most cases;
• Added warning messages for Ulgrin after giving the SCP-173 Document (the timer will start from the lastest warning message). While the player is reading a document the timer will be slowed down;
• Made the screen blur stronger when the player gets out of bed;
• Corrected position of Class D and Guard corpses in starting location when intro is disabled.