Marshalling wands update (#21921)

# Summary

This PR updates the marshalling wands and gives them intent based
coloring. In addition, hold a second wand in your hand, the settings
will be automatically synced.

## Changes

- Update marshalling wand sprite (more the structure then the actual
sprites).
- Added color modes, updated text, added mechanical hints and two hand
sync to marshall wands.
- Added signal for mob intent changes (unused at the moment).
- Adjusted Hangar Tech round start spawn points in the breakroom.
- Added second marshalling wand to each Hangar Tech locker.

## Preview

(Note this preview has been made prior further pixel adjustments,
consider it a demo.)


![dreamseeker_nYNBHIbQkl](https://github.com/user-attachments/assets/edc2d3f2-33ac-4adc-8c65-586360176e6a)

code/modules/mob/mob_helpers.dm

@@ -1252,6 +1252,7 @@ GLOBAL_LIST_INIT(organ_rel_size, list(
 
 /mob/proc/set_intent(var/set_intent)
 	a_intent = set_intent
+	SEND_SIGNAL(src, COMSIG_INTENT_CHANGE, set_intent)
 
 /mob/proc/get_accent_icon(var/datum/language/speaking, var/mob/hearer, var/force_accent)
 	SHOULD_CALL_PARENT(TRUE)