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

Made-with: Cursor

world/town/rooms/sewers_west.toml

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+name = "Western Sewers"
+description = """\
+A narrow walkway beside a sluggish, foul-smelling stream. Slime coats the brick walls, and shadows seem to move just outside your peripheral vision."""
+
+[exits]
+south = "town:sewer_entrance"
+east = "town:sewers_east"