Borg Bag Fixes and Refactors (#20578)

Fixes #19603
Fixes #20558

- bugfix: "Fixes plant bags - now uses storage_slot system, along with
other bag subtypes."
  - bugfix: "Borgs can interact with tables again."
  - refactor: "Refactors make_exact_fit to be a binary variable."
- refactor: "Refactors storage items to use make_exact_fit instead of
arbitrary max_storage_space values."
- refactor: "Refactors storage items to use defines for storage space."
  - bugfix: "Fixes monkey cube boxes having superfluous overlay."
  - rscadd: "Updates the progress bar toggle message."
- qol: "Objects that rotated 90 degrees in storage no longer rotate in
storage slots."
 
<img width="732" alt="dreamseeker_qRVkIlYN78"
src="https://github.com/user-attachments/assets/1226ed22-52c1-4965-a1b4-2290e56a2ab3"
/>

code/modules/projectiles/guns/launcher/pneumatic.dm

@@ -14,7 +14,7 @@
 
 	var/fire_pressure                                   // Used in fire checks/pressure checks.
 	var/max_w_class = WEIGHT_CLASS_NORMAL                                 // Hopper intake size.
-	var/max_storage_space = 20                       // Total internal storage size.
+	var/max_storage_space = DEFAULT_LARGEBOX_STORAGE                      // Total internal storage size.
 	var/obj/item/tank/tank = null                // Tank of gas for use in firing the cannon.
 
 	var/obj/item/storage/item_storage

code/modules/projectiles/pins.dm

@@ -45,7 +45,8 @@ Firing pins as a rule can't be removed without replacing them, blame a really sh
 
 /obj/item/firing_pin/update_icon()
 	var/matrix/tf = matrix()
-	if(istype(loc, /obj/item/storage))
+	var/obj/item/storage/S = loc
+	if(istype(S, /obj/item/storage) && !S.storage_slots)
 		tf.Turn(-90) //Vertical for storing compactly
 		tf.Translate(-1, 0) //Could do this with pixel_x but let's just update the appearance once.
 	transform = tf