ref[protocol]: use strict syntax to refactor GdScript generation

protocol/src/main/resources/gdscript/ByteBuffer.gd

@@ -1,4 +1,4 @@
-const ProtocolManager = preload("res://zfoogd/ProtocolManager.gd")
+const ProtocolManager = preload("./ProtocolManager.gd")
 
 const EMPTY: String = ""
 

protocol/src/main/resources/gdscript/ProtocolClassDefaultTemplate.gd

@@ -4,9 +4,6 @@ ${protocol_field_definition}
 func protocolId() -> int:
 	return ${protocol_id}
 
-func get_class_name() -> String:
-	return "${protocol_name}"
-
 func _to_string() -> String:
 	const jsonTemplate = "${protocol_json}"
 	var params = [${protocol_to_string}]

protocol/src/main/resources/gdscript/ProtocolRegistrationTemplate.gd

@@ -1,17 +1,17 @@
 class ${protocol_name}Registration:
-	func write(buffer: ByteBuffer, packet: Object):
+	func write(buffer: ByteBuffer, packet: ${protocol_name}):
 		if (packet == null):
 			buffer.writeInt(0)
 			return
 		${protocol_write_serialization}
 		pass
 
-	func read(buffer: ByteBuffer):
+	func read(buffer: ByteBuffer) -> ${protocol_name}:
 		var length = buffer.readInt()
 		if (length == 0):
 			return null
 		var beforeReadIndex = buffer.getReadOffset()
-		var packet = buffer.newInstance(${protocol_id})
+		var packet: ${protocol_name} = buffer.newInstance(${protocol_id})
 		${protocol_read_deserialization}
 		if (length > 0):
 			buffer.setReadOffset(beforeReadIndex + length)

protocol/src/main/resources/gdscript/ProtocolTemplate.gd

@@ -1,3 +1,5 @@
+class_name ${protocol_name}
+
 ${protocol_imports}
 
 ${protocol_class}