Add manual extractor resource transfers

GameState.gd

@@ -896,6 +896,14 @@ func has_extractor_at(planet_key: String) -> bool:
 	return false
 
 
+func extractor_index_at(planet_key: String) -> int:
+	for i in range(extractors.size()):
+		var extractor: Dictionary = extractors[i]
+		if String(extractor.get("planet_id", extractor.get("planet_name", ""))) == planet_key:
+			return i
+	return -1
+
+
 signal extractor_added(planet_name: String)
 
 
@@ -924,6 +932,24 @@ func extractor_stock(index: int) -> int:
 	return _extractor_inventory(extractor).amount(String(extractor.get("resource_type", RESOURCE_ORE)))
 
 
+func extractor_resource(index: int, resource_type: String) -> int:
+	if index < 0 or index >= extractors.size():
+		return 0
+	return _extractor_inventory(extractors[index]).amount(resource_type)
+
+
+func transfer_resource_to_extractor(index: int, resource_type: String, amount: int) -> int:
+	if index < 0 or index >= extractors.size():
+		return 0
+	return fleet_inventory.transfer_to(_extractor_inventory(extractors[index]), resource_type, amount)
+
+
+func transfer_resource_from_extractor(index: int, resource_type: String, amount: int) -> int:
+	if index < 0 or index >= extractors.size():
+		return 0
+	return _extractor_inventory(extractors[index]).transfer_to(fleet_inventory, resource_type, amount)
+
+
 func _extractor_inventory(extractor: Dictionary) -> RefCounted:
 	var inventory: RefCounted = extractor.get("inventory") as RefCounted
 	if inventory == null: