Refactors Newscaster cartridge to tablet app (#66035)

code/modules/modular_computers/file_system/programs/newscasterapp.dm

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+/datum/computer_file/program/newscaster
+	filename = "newscasterapp"
+	filedesc = "Newscaster"
+	required_access = list(ACCESS_LIBRARY)
+	category = PROGRAM_CATEGORY_CREW
+	program_icon_state = "computer"
+	extended_desc = "This program allows any user to access the Newscaster network from anywhere."
+	size = 2
+	requires_ntnet = TRUE
+	available_on_ntnet = TRUE
+	tgui_id = "NtosNewscaster"
+	program_icon = "newspaper"
+	///The UI we use for the newscaster
+	var/obj/machinery/newscaster/newscaster_ui
+
+/datum/computer_file/program/newscaster/New()
+	newscaster_ui = new()
+	return ..()
+
+/datum/computer_file/program/newscaster/Destroy()
+	QDEL_NULL(newscaster_ui)
+	return ..()
+
+/datum/computer_file/program/newscaster/ui_data(mob/user)
+	var/list/data = get_header_data()
+	data += newscaster_ui.ui_data(user)
+	return data
+
+/datum/computer_file/program/newscaster/ui_static_data(mob/user)
+	var/list/data = newscaster_ui.ui_static_data(user)
+	return data
+
+/datum/computer_file/program/newscaster/ui_act(action, params, datum/tgui/ui)
+	. = ..()
+	if(.)
+		return
+	return newscaster_ui.ui_act(action, params, ui)