Added stringtable dictionaries

- All 4 locations have been updated and expanded
- Added sounds
- Infected models have been changed to l4d1 models
- Added "Uncommon infected"
- Added new textures (overlays)
- Added the initial cutscene and dialogues
- Added randomization of paths and some events
- Added "Versus" mode
- Added 3D skyboxes
- Item spawn has been updated
- Updated post-processing
- Many other updates and fixes

Phew...

* The final battle was balanced *

• The number of common infected, the respawn time of special infected and the pause between waves depends on the
difficulty. (In general, there are fewer enemies than before),
• Now only 8 cans need to be collected in a single game.
• Fixes a bug with the lack of weapons in the safe room during restart.
• The cans are now protected from falling out of the map or into hard-to-reach places.
• Added an outline to the hangar gate buttons.
• Other small additions

Fixes of the final chapter:
1. Now in multiplayer, the enemies will spawn correctly (if they don't work for you, please write about it in the comments)
2. Fixed endless hordes and tanks, waves are working fine
3. Fixed the exit of the truck through the gate
4. The gas tank of the car is highlighted
5. The electrical panel in the dark hangar is also highlighted so that you can turn on the light there
6. Spawn of pipe bombs, molotov and bile randomized
7. The vault doors in the final are now destructible, you cannot hide from the tank)
Other minor fixes

Fixed a problem with weapon spawn and navigation + minor fixes (does anyone read this at all?)