adds a lite/digger store to Derth and the Iron Throne

game/modules/tome/data/general/stores/basic.lua

game/modules/tome/data/maps/towns/derth.lua

game/modules/tome/data/maps/towns/iron-council.lua

game/modules/tome/data/zones/town-derth/traps.lua

game/modules/tome/data/zones/town-iron-council/traps.lua

tiled-maps/derth.tmx

tiled-maps/iron-council.tmx