Grab fixes and drag overhaul

[Venera3]

Summary

Features "Unhardcode dragging, grab fixes"

Purpose of change

Unhardcode GRAB_DRAG and move it over to the new grab mattacks.
Fix some problems with the grab rework.

Describe the solution

• Added the following values to grab_data:
  • exclusive_grab - handles attempting to remove any existing grabs not originating from the base mob
  • respect_seatbelts - if the pull/drag in question is disabled by the target (character) being on a seat with a seatbelt part
  • drag_distance - number of tiles the attack will drag you
  • drag_deviation - squiggliness of the drag path
  • drag_movecost_mod - modifier on the movecost of the entire drag movement
  • drag_grab_break_distance - number of drag movements between automatic grab break attempts by the target
• Reworked the grab logic and moved most of it into its own function. It could still be prettier but it works well enough for now.
• Added an extra check to monsters to automatically remove grabs when no grabbers are found (came up on reddit, no issue for now)
• Added a new DF_MONMOVE debug mode filter because those are always handy (pretty barebones for now, but I didn't need much more)
• Removed the hardcoded grab/ranged pull/grab_drag attacks and reworked the monsters using the functions to route through the JSON specials

TODO:

• Add unit test to dragging and fix the random test failure that has been popping up
• Handle nursebots' attack in some way - the logic will probably stay hardcoded
• Handle grabbing monsters getting knocked back - probably pretty easy when the player is doing the knocking-back, we'll see if we get a nice solution for third-party knockbacks. This includes knocked-back monsters releasing their grab, Add conditionals to martial art techniques and audit techs to use them #66034 will handle if they get to get knocked back - Fixes Grabs not broken by Brutal Strike pushing grabber away #65484
• Fix Grabbed status sticks around after grabbing enemy is killed #65848
• Fix Faulty nurse bot only rips one bionic #64918

Describe alternatives you've considered

Use dragging to flip monster pathing to drag you away on subsequent moves, but ran into dragged_enemy being character-only and monsters not having unique ids among other things.
Advance turns or burn moves for longer drags - this would make them feel less jank, but the followup attack cycle is close enough and leaves you more options to resist.

Testing

Got dragged a lot by things, worked about right.
Got a nursebot to operate on a bionic survivor. Also got repeat removals (in different sittings) after fixing the grabbing removal.

Additional context

Drags are set up with the following logic: initial grab_drag attack as an exclusive grab disallowing previous grabs that drags, and a low-cooldown drag_followup attack that requires an existing grab by the monster to trigger (and tries removing all other grabs).

[github-actions]

Spell checker encountered unrecognized words in the in-game text added in this pull request. See below for details.

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• debug dragger
• debug draggers

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[LyleSY]

Overall logic makes sense to me

[bombasticSlacks]

You have a conflict now, sorry I thought this was already merged lol

[andrei8l]

Can you also check whether this fixes #64918?

[Venera3]

Can you also check whether this fixes #64918?

Confirmed fixed