New Behringer Wing functionality added

thanks to @speedy3wk

Expanded WING OSC mapping and documentation (headamps, channel preamp, USB player/recorder, bus→bus, bus→matrix/main pre, /status handling, scribble light mapping).
Added WING variants: WINGRACK and WINGCOMPACT.
Improved WING info/ACK handling.
Updated WING color indexing (18 colors, 0-based internal indices with 1-based device writes; no OFF observed) and headamp gain normalization.
Added Wing test.
New / expanded tags
- headamps
- channelpreamp
- usbrec
- busbussends

New keys / expanded keys

Channel preamp
- /ch//preamp_gain
- /ch//preamp_phantom
- /ch//input_mode
- /ch//input_srcauto
- /ch//input_altsrc
- /ch//input_invert
- /ch//input_trim
- /ch//input_balance
- /ch//input_delay_mode
- /ch//input_delay
- /ch//input_delay_on
- /ch//input_conn_grp
- /ch//input_conn_in
- /ch//input_alt_conn_grp
- /ch//input_alt_conn_in
Scribble light
- /ch//config_led
- /auxin//config_led
Headamps (local + AES50)
- /headamp//gain, /headamp//phantom, /headamp//config_name, /headamp//config_color
- /headamp/a//gain, /headamp/a//phantom, /headamp/a//config_name, /headamp/a//config_color
- /headamp/b//gain, /headamp/b//phantom, /headamp/b//config_name, /headamp/b//config_color
- /headamp/c//gain, /headamp/c//phantom, /headamp/c//config_name, /headamp/c//config_color
USB player
- /usb/playlist/path
- /usb/playlist/index
- /usb/playlist/songs
USB recorder
- /usb/rec/state
- /usb/rec/file
- /usb/rec/action
- /usb/rec/resolution
- /usb/rec/channels
- /usb/rec/time
Bus sends
- /busbussend///mix_on
- /busbussend///mix_fader
- /busbussend///pre
- /bussend///pre
- /busmainsend///pre
Info
- /status