Added player and a basic test level

Entities/Player/player_state_scripts/ground_movement/slide_state.gd

@@ -0,0 +1,21 @@
+extends NodeState
+
+@export var player: Player
+@export var animatedSprite2D: AnimatedSprite2D
+@export var collisionShapeMove: AnimationPlayer
+
+func enter() -> void:
+	collisionShapeMove.play("Crouch")
+
+func on_phyisics_process(_delta: float) -> void:
+	
+	transition_states()
+
+func on_process(_delta: float) -> void:
+	pass
+
+func exit() -> void:
+	collisionShapeMove.play("Normal")
+
+func transition_states() -> void:
+	pass