Refactor rhythm action architecture

resources/actions/skill_s_projectile_2.tres

@@ -0,0 +1,20 @@
+[gd_resource type="Resource" script_class="ActionData" load_steps=2 format=3]
+
+[ext_resource type="Script" path="res://resources/action_data.gd" id="1"]
+[ext_resource type="PackedScene" path="res://scenes/combat/player_projectile.tscn" id="2"]
+
+[resource]
+script = ExtResource("1")
+id = &"skill_s_projectile_2"
+display_name = "S+SP+SP"
+input_pattern = Array[StringName]([&"S", &"SP", &"SP"])
+startup_beats = 0.25
+active_beats = 0.25
+recovery_beats = 0.5
+cancel_from = 0.5
+animation = &"warrior_s_projectile"
+energy_cost = 2.0
+spawns_projectile = true
+projectile_scene = ExtResource("2")
+clear_window = false
+can_chain = true