[TF2] Restore the Shred Alert's tauntkill (behind a cvar)

[FlaminSarge]

Description

Also, it now blows victims' minds.
Demonstration:

• Adds cvar tf_allow_econ_tauntkill, which, when enabled, allows equippable taunts to damage and kill enemies if they are able to do so, such as:
• Adds a secondary TAUNTATK (TAUNTATK_ALLCLASS_GUITAR_RIFF_EXPLODE) for the Shred Alert that restores the old functionality of its original TAUNTATK (explosion at the taunt's finale, with the same functionality as Rainblower taunt).
  • The damage from this is set to decapitate victims, omits the head gib, and plays the decapitation/headshot ragdoll animation

NOTE: The following block should also be added to tf/scripts/mod_textures.txt for the Kill Icon

        "taunt_guitar_riff_kill"
        {
                "dfile"    "HUD/d_images_v3"
                "dnegfile"    "HUD/dneg_images_v3"
                "x"        "256"
                "y"        "448"
                "width"        "128"
                "height"    "32"
        }

[FlaminSarge]

This is mostly meant for community mods to make use of, rather than to be merged into mainline TF2.

However, there are some bugs with decapitation ragdoll handling that I am looking to fix in another PR (decapitating a player with a sword will remove all of their ragdoll's cosmetics instead of just their head cosmetics, since all items are considered MISC loadout slot now). Those fixes should end up being acceptable to merge to mainline.

[PKPenguin321]

It's neat but I dislike any implementation of code that explicitly ties econ to gameplay, even if niche or disabled by default

[FlaminSarge]

It's neat but I dislike any implementation of code that explicitly ties econ to gameplay, even if niche or disabled by default

https://wiki.teamfortress.com/wiki/Crypt_Creeper
(this comment is a joke)