feat: implement multiplayer network manager and player movement controller with base game entities and UI

entities/walking_dummy.gd

@@ -11,6 +11,7 @@ var max_shield: float = 100.0
 var shield: float = 100.0
 
 var is_dead: bool = false
+var recent_attackers: Dictionary = {} # attacker_id: timestamp
 var ragdoll_instance: Node3D = null
 var pending_impulse: Vector3 = Vector3.ZERO
 
@@ -85,6 +86,18 @@ func take_damage(amount: float, hit_position: Vector3, source: Node = null) -> v
 	if is_dead:
 		return
 		
+	var attacker_id = 0
+	if source:
+		if source.has_method("get_multiplayer_authority"):
+			attacker_id = source.get_multiplayer_authority()
+		elif "owner_player" in source and source.owner_player:
+			attacker_id = int(str(source.owner_player.name))
+		elif source is CharacterBody3D:
+			attacker_id = int(str(source.name))
+			
+	if attacker_id != 0:
+		recent_attackers[attacker_id] = Time.get_ticks_msec() / 1000.0
+		
 	var dmg_taken = amount
 	if shield > 0:
 		if shield >= amount:
@@ -119,7 +132,14 @@ func take_damage(amount: float, hit_position: Vector3, source: Node = null) -> v
 				
 				if source.has_method("get_weapon_name"):
 					weapon_name = source.get_weapon_name()
-			nm.register_kill.rpc(-1, killer_id, weapon_name, "Walking Dummy")
+					
+			var assist_ids: Array = []
+			var now = Time.get_ticks_msec() / 1000.0
+			for aid in recent_attackers.keys():
+				if now - recent_attackers[aid] <= 10.0:
+					assist_ids.append(aid)
+					
+			nm.register_kill.rpc(-1, killer_id, weapon_name, "Walking Dummy", assist_ids)
 	else:
 		_wiggle()