Led light control, close #991 (#1106)

* feature: add leds panel

* Various refactors and improvements

* lint fixes

* led: use more columns for the selector

* leds: name in the title

* mainsail presets

* change sliders to horizontal to avoid visual bug, simplify defaults

* led: add a color preview and simplify methods to fix some issues

* simplify presets move all the logic to the panel

* led: change presets from names to previews

* preview label shows color, add vertical mode

* led: colored previews as rectangles instead of circles

---------

Co-authored-by: alfrix <alfredomonclus@gmail.com>

screen.py

@@ -261,6 +261,8 @@ class KlipperScreen(Gtk.Window):
             requested_updates['objects'][f] = ["enabled", "filament_detected"]
         for p in self.printer.get_output_pins():
             requested_updates['objects'][p] = ["value"]
+        for led in self.printer.get_leds():
+            requested_updates['objects'][led] = ["color_data"]
 
         self._ws.klippy.object_subscription(requested_updates)
 
@@ -904,6 +906,7 @@ class KlipperScreen(Gtk.Window):
                        + self.printer.get_fans()
                        + self.printer.get_filament_sensors()
                        + self.printer.get_output_pins()
+                       + self.printer.get_leds()
                        )
 
         data = self.apiclient.send_request("printer/objects/query?" + "&".join(PRINTER_BASE_STATUS_OBJECTS +