Dominia Flag Update (New flags, adjusted old) (#21274)

A slight clean up to Dominia flags.

- Zhurong Flag added: description text by Schwann / Human Lore
- Kazhkz and Han'san flags removed from loadout per request of Captain
Gecko / Unathi Lore
- Kazhkz, Han'san and Imperial Diona flags slightly tweaked. They still
do occationally appear in random loot, so the flavour text (and name for
the diona flag) have been adjusted to make sure they're not completely
lore breaking in those instances.

---------

Signed-off-by: Fyni <itsfyni@gmail.com>
Co-authored-by: FlamingLily <80451102+FlamingLily@users.noreply.github.com>

code/modules/client/preference_setup/loadout/items/general.dm

@@ -278,6 +278,7 @@
 	banners["banner, Visegrad"] = /obj/item/flag/visegrad
 	banners["banner, Burzsia"] = /obj/item/flag/burzsia
 	banners["banner, HPS Narrows"] = /obj/item/flag/narrows
+	banners["banner, Zhurong"] = /obj/item/flag/zhurong
 	gear_tweaks += new /datum/gear_tweak/path(banners)
 
 /datum/gear/standard
@@ -290,8 +291,6 @@
 	var/list/standards = list()
 	standards["standard, Strelitz"] = /obj/item/flag/strelitz
 	standards["standard, Volvalaad"] = /obj/item/flag/volvalaad
-	standards["standard, Kazhkz"] = /obj/item/flag/kazhkz
-	standards["standard, Han'san"] = /obj/item/flag/hansan
 	standards["standard, Caladius"] = /obj/item/flag/caladius
 	standards["standard, Zhao"] = /obj/item/flag/zhao
 	gear_tweaks += new /datum/gear_tweak/path(standards)
@@ -379,6 +378,7 @@
 	flags["flag, Visegrad"] = /obj/item/flag/visegrad/l
 	flags["flag, Burzsia"] = /obj/item/flag/burzsia/l
 	flags["flag, HPS Narrows"] = /obj/item/flag/narrows/l
+	flags["flag, Zhurong"] = /obj/item/flag/zhurong/l
 	gear_tweaks += new /datum/gear_tweak/path(flags)
 
 /datum/gear/towel