conforms file names to consistant standard

characters/fsm/hero_state.gd

@@ -0,0 +1,20 @@
+class_name HeroState
+extends Node
+
+@warning_ignore("unused_signal")
+signal state_changed(new_state: HeroState)
+
+@export var hero: Hero
+
+
+func enter_state() -> void:
+	pass
+
+
+func exit_state() -> void:
+	pass
+
+
+@warning_ignore("unused_parameter")
+func process_state(delta: float) -> void:
+	pass