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

Made-with: Cursor

world/whispering_woods/objects/mushroom.toml

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+name = "Magic Mushroom"
+description = "A small, glowing mushroom with a sweet, earthy scent. It seems to pulse with a faint light."
+room = "whispering_woods:hidden_glade"
+kind = "consumable"
+
+[stats]
+hp_restore = 20
+mana_restore = 10

world/whispering_woods/objects/staff.toml

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+name = "Elderwood Staff"
+description = "A gnarled staff made from the wood of an ancient oak tree. It's cool to the touch and seems to hum with a faint energy."
+room = "whispering_woods:ancient_oak"
+slot = "main_hand"
+kind = "weapon"
+
+[stats]
+attack = 15
+defense = 5
+mana_bonus = 20