traitors challenge UI/UX related improvements.

[ywgATustcbbs]

1. Refactored ultra-wide screen mouse restriction code: Moved the main detection logic to asw_hud_master::OnThink() and reduced cpu load. Moved drawing code to asw_hud_master::Paint().

2. Add two new CVARs:
   2.1 rd_draw_restricted_rectangles_coop (FCVAR_ARCHIVE | FCVAR_REPLICATED | FCVAR_NOTIFY)
   2.2 rd_draw_restricted_rectangles_dm (FCVAR_ARCHIVE | FCVAR_REPLICATED | FCVAR_CHEAT | FCVAR_NOTIFY)
   2.3 Purpose: Fill extra side FOVs with black on ultra-wide resolutions in coop / DM mode.

3. Move marine / weapon icons into the 16:9 area.

4. Move mission objectives into the 16:9 area.

5. Adapt 3D marine labels for ultra-wide screens accroding to different CVAR settings.

[ywgATustcbbs]

Couldn't find a way to move minimap into 16:9 area. I can't figure out how it's drawn. Sad

[ywgATustcbbs]

Previous 3 commits

1. Update Traitors challenge: Added a new convar to insert player slot Index before player name. This will help to distinguish players. There were players renaming names to a string very much similar to another player. It had confused others and was unfair.
2. Renamed traitors files and folders so that they shared the same prefix.
3. Minor fix: Added .ValidateScriptScope() to some codes, hoping this will fix some index not found errors.
4. Added 5 VScript functions to get High Quality Random Numbers using MT19937 algorithm.
   4.1. void RandomHQSetSeed(int seed). This function is used to set a specific seed value for reproducibility.
   4.2. void RandomHQSetRandomDevice(). This function is useful to reset the generator to a non-deterministic state.
   4.3By default, you don't need to call these functions, as it will automatically seed the generator to a non-deterministic state upon game initialization.
   4.4. int RandomHQUniformIntDistribution(int min, int max). Returns a uniformly distributed random integer in the range [min, max]. If min > max, the values are swapped.
   4.5. float RandomHQUniformFloatDistribution(float min, float max). Returns a uniformly distributed random float in the range [min, max]. If min > max, the values are swapped.
   4.6. float RandomHQNormalDistribution(float mean, float std_dev). Returns a normally(Gaussian) distributed random float with the specified mean and standard deviation. If std_dev <= 0.0f, it sets stddev to 1.0f.
5. Updated Traitors challenge to use c++ versions of RNG.

[ywgATustcbbs]

Everything goes well on my pc.
Tested on listen server, including all intended changes.

Ready for review

[BenLubar]

If you want to update the https://developer.valvesoftware.com/wiki/Alien_Swarm:_Reactive_Drop/Scripting/Script_Functions page with the script functions you added, go ahead.