Harm Intent Unarmed Melee Changes: More diverse logs, effects
Manual Merge
Relocates combat log proc as a child of unarmed_attack, adds procs for
checking antagonists and close combat modifiers
Custom item deleted and added to loadout pool
Removes extra breaks

I am dumb
I am dumb

It is what it is.
Adds inhand sprites for the captain's tunic and jacket
Examining robomodules.
Robotic flavour texts.
Solves a runtime when someone tries to mop up blood.

proc name: afterattack (/obj/item/weapon/mop/afterattack)
  source file: mop.dm,45
runtime error: undefined proc or verb /obj/effect/decal/cleanable/blood/tracks/footprints/clean().
AI disposal interaction.

The AI can now interact with disposal units and turn the pump on/off.
Fixes light going through walls.

See https://github.com/tgstation/-tg-station/pull/5972 and https://github.com/tgstation/-tg-station/issues/2788.
Merge pull request #7114 from Zuhayr/dev

Dev
The chat window has now unlimited backlog size
Map fixes - Vacuum Removal

A number of tiles seem to have inherited settings which are now inappropriate.
Removing these even though the pressure difference between these near-vacuum and standard pressure areas could cause hilarious injuries at round-start.
Fixes #7113

Flips the wiring around.
Merge pull request #7101 from MagmaRam/sprites

Adds inhand sprites for the captain's tunic and jacket
Merge pull request #7103 from Segrain/dev

Robotic appearances.
Merge pull request #7109 from Ccomp5950/mop_fix

Solves a runtime when someone tries to mop up blood.
Merge remote-tracking branch 'upstream/master' into dev