Makes playing cards playable -- significantly reworks card interactions (#26585)

* Basic card interactions

* initial interactions sorted

* nails down some interactions, radial menu

* Some more qol and keybind changes

* improves card interactions

* Unum decks can be flipped, showing the top card

* Decks can now be split and recombined

* minor tweaks to multi-deck stuff

* Clean up a bunch of interactions

* more cleanups

* more cleanups and documentation

* remote attacking looks pretty good

* minor cleanups

* ci

* parser errs

* Remove some debug things, re-add signal after merge

* Adds a whole bunch more qol.

* Improves examine messages

* ci

* concealed cards will now show properly in radial

* Fixes some weird proximity monitor and control issues

* Address reviews, clean up examine a bit more

* radial fixes

* remove todos

* Apply suggestions from code review

Co-authored-by: Burzah <116982774+Burzah@users.noreply.github.com>
Signed-off-by: Luc <89928798+lewcc@users.noreply.github.com>

* better documentation, adds label of who did what

* b etter grammar

* augh

* missing icon state

* Update code/game/gamemodes/wizard/magic_tarot.dm

Co-authored-by: Burzah <116982774+Burzah@users.noreply.github.com>
Signed-off-by: Luc <89928798+lewcc@users.noreply.github.com>

* Apply suggestions from code review

Co-authored-by: DGamerL <108773801+DGamerL@users.noreply.github.com>
Signed-off-by: Luc <89928798+lewcc@users.noreply.github.com>

* Add sleep on proximity monitor setup to hopefully avoid mapload issues

* been writing too much c lately

* Try late initialize

* late init

* 🧌

* map load

---------

Signed-off-by: Luc <89928798+lewcc@users.noreply.github.com>
Co-authored-by: Burzah <116982774+Burzah@users.noreply.github.com>
Co-authored-by: DGamerL <108773801+DGamerL@users.noreply.github.com>

code/modules/mob/living/carbon/human/human_inventory.dm

@@ -11,7 +11,6 @@
 		return l_hand
 	if(istype(r_hand,typepath))
 		return r_hand
-	return 0
 
 
 /mob/living/carbon/human/proc/has_organ(name)