Handle warnings (receive only)

Signed-off-by: Yohann D'ANELLO <ynerant@crans.org>

squinnondation/squinnondation.py

@@ -398,6 +398,9 @@ class WarningTLV(TLV):
             self.length.to_bytes(1, "big") + \
             self.message.encode("UTF-8")[:self.length]
 
+    def handle(self, squirrel: "Squirrel", sender: "Hazelnut") -> None:
+        squirrel.add_message(f"<warning> *A client warned you: {self.message}*")
+
 
 class Packet:
     """