FaxBond app for bonding with your fax (fax message subscription app) (#96467)

## About The Pull Request
Adds an up that allows you to subscribe to any fax. Heads start with one
by default and they are subscribed to their office fax upon joining.
Later part involved creation of fax subtype specific to a head. So i
decided to also make those as a required map item for the purposes of
CI.

<details>
<summary>UI</summary>
<img width="435" height="552" alt="изображение"
src="https://github.com/user-attachments/assets/73b814d5-3009-4c76-a829-c01f021aecf4"
/>

</details>

its pretty simplistic, but i am not a UI designer, sorry
## Why It's Good For The Game

It really sucks when you wait for someones message but they never
respond to it because apparently they never visit their office and never
saw a paper over their fax if even if they responded, by the time you
get an answer you already forgot about it anyway. In general, it makes
paperwork experience relating to faxes more enjoyable (probably)
## Changelog
🆑
add: added a FaxBond app. Everyone can download it and use it on a fax
of their choice to be notified when it receives a message. Heads of
staff come with it preinstalled and automatically subscribed to a fax
inside their office.
/🆑

code/modules/modular_computers/computers/item/role_tablet_presets.dm

@@ -7,11 +7,15 @@
 	greyscale_config = /datum/greyscale_config/tablet/head
 	greyscale_colors = "#67A364#a92323"
 	max_capacity = parent_type::max_capacity * 2
+	/// Fax type for a relevant head's tp connect their PDA to (for use with fax notification app)
+	var/fax_type = null
+
 	var/static/list/datum/computer_file/head_programs = list(
 		/datum/computer_file/program/status,
 		/datum/computer_file/program/science,
 		/datum/computer_file/program/robocontrol,
 		/datum/computer_file/program/budgetorders,
+		/datum/computer_file/program/faxbond,
 	)
 
 /obj/item/modular_computer/pda/heads/Initialize(mapload)
@@ -20,12 +24,19 @@
 		var/datum/computer_file/program/program_type = new programs
 		store_file(program_type)
 
+	if (ispath(fax_type, /obj/machinery/fax))
+		var/datum/computer_file/program/faxbond/fax_notifier = locate() in stored_files
+		var/list/faxes_list = SSmachines.get_machines_by_type(fax_type)
+		var/obj/machinery/fax/heads_fax = length(faxes_list) ? pick(faxes_list) : null //there really shouldnt be more than one
+		fax_notifier.connect_fax(heads_fax)
+
 /obj/item/modular_computer/pda/heads/captain
 	name = "captain PDA"
 	icon_state = "/obj/item/modular_computer/pda/heads/captain"
 	greyscale_config = /datum/greyscale_config/tablet/captain
 	greyscale_colors = "#2C7CB2#FF0000#FFFFFF#FFD55B"
 	inserted_item = /obj/item/pen/fountain/captain
+	fax_type = /obj/machinery/fax/heads/captain
 
 /obj/item/modular_computer/pda/heads/captain/Initialize(mapload)
 	. = ..()
@@ -42,6 +53,7 @@
 	icon_state = "/obj/item/modular_computer/pda/heads/hop"
 	greyscale_config = /datum/greyscale_config/tablet/stripe_thick/head
 	greyscale_colors = "#374f7e#a52f29#a52f29"
+	fax_type = /obj/machinery/fax/heads/hop
 	starting_programs = list(
 		/datum/computer_file/program/records/security,
 		/datum/computer_file/program/job_management,
@@ -53,6 +65,7 @@
 	greyscale_config = /datum/greyscale_config/tablet/head
 	greyscale_colors = "#EA3232#0000CC"
 	inserted_item = /obj/item/pen/red/security
+	fax_type = /obj/machinery/fax/heads/hos
 	starting_programs = list(
 		/datum/computer_file/program/records/security,
 	)
@@ -62,6 +75,7 @@
 	icon_state = "/obj/item/modular_computer/pda/heads/ce"
 	greyscale_config = /datum/greyscale_config/tablet/stripe_thick/head
 	greyscale_colors = "#D99A2E#69DBF3#FAFAFA"
+	fax_type = /obj/machinery/fax/heads/ce
 	starting_programs = list(
 		/datum/computer_file/program/atmosscan,
 		/datum/computer_file/program/alarm_monitor,
@@ -73,6 +87,7 @@
 	icon_state = "/obj/item/modular_computer/pda/heads/cmo"
 	greyscale_config = /datum/greyscale_config/tablet/stripe_thick/head
 	greyscale_colors = "#FAFAFA#000099#3F96CC"
+	fax_type = /obj/machinery/fax/heads/cmo
 	starting_programs = list(
 		/datum/computer_file/program/maintenance/phys_scanner,
 		/datum/computer_file/program/records/medical,
@@ -84,6 +99,7 @@
 	greyscale_config = /datum/greyscale_config/tablet/stripe_thick/head
 	greyscale_colors = "#FAFAFA#000099#B347BC"
 	inserted_item = /obj/item/pen/fountain
+	fax_type = /obj/machinery/fax/heads/rd
 	starting_programs = list(
 		/datum/computer_file/program/borg_monitor,
 		/datum/computer_file/program/scipaper_program,
@@ -97,6 +113,7 @@
 	greyscale_colors = "#c4b787#18191e#8b4c31"
 	inserted_item = /obj/item/pen/survival
 	stored_paper = 20
+	fax_type = /obj/machinery/fax/heads/qm
 	starting_programs = list(
 		/datum/computer_file/program/shipping,
 		/datum/computer_file/program/restock_tracker,