Leverage data from UDP discovery to initialize device structure (#132)

* avoid talking to devices after UDP discovery

* formatting fix

* more formatting

* more formatting changes

* undo gitignore changes

* fixing git ignore for black

Co-authored-by: dlee1j1 <dlee1j@yahoo.comm>

kasa/smartdevice.py

@@ -304,6 +304,11 @@ class SmartDevice:
         # TODO: keep accessible for tests
         self._sys_info = self._last_update["system"]["get_sysinfo"]
 
+    def update_from_discover_info(self, info):
+        """Update state from info from the discover call."""
+        self._last_update = info
+        self._sys_info = info["system"]["get_sysinfo"]
+
     @property  # type: ignore
     @requires_update
     def sys_info(self) -> Dict[str, Any]: