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

Made-with: Cursor

world/classes/warden.toml

@@ -0,0 +1,13 @@
+name = "Warden"
+description = "Vigilant defenders of the forest, wardens balance physical prowess with nature's magic."
+guild = "guild:druids_guild"
+
+[base_stats]
+max_hp = 110
+attack = 10
+defense = 12
+
+[growth]
+hp_per_level = 12
+attack_per_level = 2
+defense_per_level = 3