First Course; Soups, Salads, Sandwiches! Splits food.dmi in preparation for future PRs. (#22866)

* ORDER UP

* whoops

* slimes ur jelly sammich

* whoops 2

* prettier pretty patties

* whoops 3

* the splittening

* Henri review

* contra review + repathening

* salad bowl

* contra review 3.0

* renamed plain burger to burger, clarified need for abstract item

* DG Review

code/game/objects/items/weapons/RSF.dm

@@ -30,7 +30,7 @@
 							"Newdles" = /obj/item/reagent_containers/food/snacks/chinese/newdles,
 							"Donut" = /obj/item/reagent_containers/food/snacks/donut,
 							"Chicken Soup" = /obj/item/reagent_containers/food/drinks/chicken_soup,
-							"Tofu Burger" = /obj/item/reagent_containers/food/snacks/tofuburger)
+							"Tofu Burger" = /obj/item/reagent_containers/food/snacks/burger/tofu)
 	var/static/list/rsf_icons = list("Drinking Glass" = image(icon = 'icons/obj/drinks.dmi', icon_state = "glass_empty"),
 							"Paper" = image(icon = 'icons/obj/bureaucracy.dmi', icon_state = "paper"),
 							"Pen" = image(icon = 'icons/obj/bureaucracy.dmi', icon_state = "pen"),

code/game/objects/items/weapons/storage/backpack.dm

@@ -781,6 +781,7 @@
 /obj/item/reagent_containers/food/snacks/plum_pie
 	name = "perfect plum pie"
 	desc = "The Jack Horner brand of pie. 2 big thumbs up."
+	icon = 'icons/obj/food/bakedgoods.dmi'
 	icon_state = "plump_pie"
 	filling_color = "#B8279B"
 	bitesize = 10