feat(world): expand Halfstreet content slices

src/world/rooms/vault.md

@@ -0,0 +1,26 @@
+---
+id: vault
+title: "[ Vault ]"
+exitN: "[[chapel]]"
+exitS: null
+exitE: null
+exitW: "[[chamber]]"
+exitU: null
+exitD: null
+items: []
+encounter: null
+safe: true
+---
+
+## first-visit
+The vault holds what was buried at Halfstreet.
+
+It is smaller than dread made it. A child's brass bed stands in the center of the room. Beside it, a photograph has been turned face down on the coverlet.
+
+North, the stonework narrows toward a chapel.
+
+## revisit
+The vault remains small.
+
+## examined
+The bedclothes have yellowed but have not rotted. The turned photograph is dry and clean. Around the bed, the stone floor is marked by a circle of old lamp soot. A low chapel lies north.