Add an ambient light implementation

Following !20 (closed) @zewelor @stavros

It is another implementation for the ambient light of the JIAOYUE 650.

Highlights:

• Enum ControlType for MAIN and AMBIENT.
• Added the bg_x properties for get_properties and the action_property_map
• Dict ControlPrefix with an empty prefix for MAIN and bg_ prefix for the AMBIENT light.
• The @_command decorator has been modified to take: method, params, kwargs.
• The @_command decorator now prefix the method depending on the type value such as bulb.turn_on(type=ControlType.AMBIENT). If omitted, default to ControlType.MAIN.

TODOS:

• Unit tests

TEST RESULTS:

• turn_on: OK
• turn_off: OK
• set_color_temp: OK
• set_rgb: OK
• set_adjust: OK
• set_hsv: OK
• set_brightness: OK
• toggle: OK
• dev_toggle: OK
• set_default: OK
• start_flow: OK
• stop_flow: OK