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

Made-with: Cursor

world/town/npcs/sewer_mutant.toml

@@ -0,0 +1,12 @@
+name = "Sewer Mutant"
+description = "A horrific amalgamation of rat and something far worse. It drools a caustic green slime."
+room = "town:sewers_west"
+base_attitude = "hostile"
+class = "class:creature"
+race = "race:beast"
+
+[stats]
+hp = 90
+attack = 12
+defense = 8
+xp = 120