Add world content: warden class, druids guild, sylvan race, town expansion, whispering_woods region

Made-with: Cursor

world/town/rooms/sewer_entrance.toml

@@ -0,0 +1,7 @@
+name = "Sewer Entrance"
+description = """\
+The smell here is atrocious. A rusty iron grate has been pried open, revealing a slippery stone tunnel that descends into the city's underbelly. The sound of rushing water echoes from the darkness."""
+
+[exits]
+up = "town:cellar"
+north = "town:sewers_west"