klippy: Run the MCU connect code within the reactor

Setup the reactor and run the MCU connection code as a timer within
the reactor.  The connection code will make use of reactor greenlets
so that it can wait for events during the connection phase.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

klippy/gcode.py

@@ -59,7 +59,6 @@ class GCodeParser:
                                    for h in handlers)
     def run(self):
         self.fd_handle = self.reactor.register_fd(self.fd, self.process_data)
-        self.reactor.run()
     def finish(self):
         self.reactor.end()
         self.toolhead.motor_off()