Mobility Atomization 7: Crit Status and Succumbing alert

[Tsar-Salat]

About The Pull Request

atomization of #8965

Further contributes to the removal of update_mobility():

• Adds an extra stat define for checking hardcrit/fullcrit, rather than relying on a proc InFullCritical(). We already have standardized stat checks as UNCONSCIOUS or SOFTCRIT, etc. So this snowflaking made no sense.
• Adds new trait to replace indirect non-stat usages of InFullCritical()
• Fixes a few weird checks, now that we can properly determine a carbon being either in soft or hard crit status.
• Adds a new succumb alert. Removes whispering whilst in crit killing the user, instead "Last Words" are done through the alert.

Ports:

• Crit status refactor tgstation/tgstation#53117
• Adds a succumb alert prompt tgstation/tgstation#52892

Why It's Good For The Game

Cleanup of stat code, furthering progress of removing update_mobility.

I also think the alert has twofold benefits, both preventing accidental death when the player is just trying to whisper, and making it less ambiguous to admins when a player is salt ghosting while in crit (i.e. to prevent capture via xenos)

Testing Photographs and Procedure

Screenshots&Videos

Blind vision working

dreamseeker_36MnlDST1D.mp4

Succumbing

dreamseeker_zmca2mmsOj.mp4

Changelog

🆑 rkz, Mothblocks, Ryll/Shaps
add: Adds new succumb HUD alert upon crit status. Replaces the old "Whisper to die" system.
refactor: Refactored stat system to check hardcrit directly
fix: fixed stat handling to utilize new hardcrit check, reducing duplicate code
/:cl:

[PowerfulBacon]

Seems fine, needs to get in before it skews