[TF2] Request - Add a "bottomless" flag to trigger_hurt for bottomless pits to be more convincing

[IronFoxGaming]

Lots of maps made for TF2 feature kill zones in out of bounds areas, where players will die after falling off of the normal playing area. Most of these work perfectly fine, but a few maps place these over pits that are visually designed to look bottomless. While these functionally work without any issue, the camera will still follow the player's ragdoll into the pit, and you'll see their ragdoll hit the bottom of the black empty space, or the skybox at the bottom making the body appear to float in the air. I think a new flag for the trigger_hurt brush entity could help to visually improve on this a little bit.

Once the player dies while in the hurt trigger with this flag active, or their ragdoll contacts the trigger with the flag active, the camera would stop moving to follow the entity being spectated, and only rotate to face it. This can give the illusion of the ragdoll falling forever, and wouldn't let players see the boundaries of maps that are meant to be presented as not being there. This could work great for maps like ctf_doublecross, cp_steel, Nucleus's various forms, and the various grinders on MvM maps and vsh_distillery. There could also be an option to make the ragdoll no longer collide with the world after moving past the trigger, and having it be deleted once it leaves the boundaries of the map.

[KimmyTF2]

https://youtu.be/cVL3eUUUTf0?si=HC3wZWSi32RxxlaL
It could work like in Overwatch. The camera stays above the trigger and only follows your ragdoll, so the player can't see what's at the bottom.

https://www.youtube.com/watch?v=XlURrsIC28U
Optionally, it could also trigger screams (also like in Overwatch) when a player falls into such a pit. Valve could reuse screams used when a player falls into a bottomless pit on Halloween maps, only shortened.