feat(custom): add flags for custom items

code/modules/client/preference_setup/loadout/lists/custom.dm

@@ -4,6 +4,11 @@
 	var/required_access
 	var/datum/custom_item/item_data
 	var/patreon_type
+	var/static/list/gear_flag_names_to_flag = list(
+		"GEAR_HAS_COLOR_SELECTION" = 1,
+		"GEAR_HAS_TYPE_SELECTION" = 2,
+		"GEAR_HAS_SUBTYPE_SELECTION" = 4,
+	)
 
 /datum/gear/custom_item/New(key, item_path, datum/custom_item/data)
 	var/obj/item/A = item_path
@@ -29,6 +34,9 @@
 	allowed_roles = job_types
 	required_access = data.req_access
 	item_data = data
+	if(length(data.flags_list))
+		for(var/flag_name in data.flags_list)
+			flags |= gear_flag_names_to_flag[flag_name]
 	..()
 	gear_tweaks += new /datum/gear_tweak/custom(item_data)
 

code/modules/customitems/item_spawning.dm

@@ -28,6 +28,7 @@
 	var/item_path_as_string
 	var/req_access = 0
 	var/list/req_titles = list()
+	var/list/flags_list = list()
 	var/kit_name
 	var/kit_desc
 	var/kit_icon
@@ -164,6 +165,7 @@
 			current_data.req_access = item_data["req_access"]
 			current_data.req_titles = item_data["req_titles"]
 			current_data.additional_data = item_data["additional_data"]
+			current_data.flags_list = item_data["flags_list"]
 
 			current_data.assoc_key = ckey
 			current_data.item_path = item_path

config/schema/custom_items.schema.json

@@ -71,6 +71,12 @@
                 "additional_data": {
                   "type": "string"
                 },
+                "flags_list": {
+                  "type": "array",
+                  "items": {
+                    "type": "string"
+                  }
+                },
                 "patreon_type": {
                   "type": "string",
                   "description": "If there's no nil string, it will be required to have this patreon type or higher to posses item."