Jukebox TGUI update, Earphones autoplay, sound keys refactor (#21630)

V2 of [previous music playing
PR](https://github.com/Aurorastation/Aurora.3/pull/21466). TLDR no
longer uses the connect_range component for implementation because it
turned out a bit too inflexible for overlapping music players.

Removes a NanoUI template for the [TGUI
update](https://github.com/Aurorastation/Aurora.3/pull/21046).

New changelog:
  - refactor: "Ported Jukebox's NanoUI interface to TGUI."
- refactor: "Ported Jukebox audio playing functionality to a component."
- refactor: "Sound keys refactored from singletons to datums, along with
larger breakout of sound.dm to allow for easier SFX updates in future."
  - code_imp: "Expanded track datums to include track lengths."
- code_imp: "Reorganized music file folders for more intuitive access."
  - rscadd: "Earphone status feedback text now includes track length."
  - rscadd: "Added autoplay functionality to earphones."
- bugfix: "Fixed earphones' 'Previous Song' verb not sending you to the
end of the playlist when used while the first track is selected."
- bugfix: "Fixed gain adjustment for 'Konyang-1' (-23 dB -> standard
-9.8 dB)."
- bugfix: "Fixed y-offset of audioconsole-running overlay animation to
line up with the actual screen."

---------

Co-authored-by: VMSolidus <evilexecutive@gmail.com>

code/modules/modular_computers/computers/modular_computer/core.dm

@@ -45,7 +45,7 @@
 	check_update_ui_need()
 
 	if(looping_sound && working && enabled && world.time > ambience_last_played_time + 30 SECONDS && prob(3))
-		playsound(get_turf(src), /singleton/sound_category/computerbeep_sound, 30, 1, 10, required_preferences = ASFX_AMBIENCE)
+		playsound(get_turf(src), SFX_COMPUTER_BEEP, 30, 1, 10, required_preferences = ASFX_AMBIENCE)
 		ambience_last_played_time = world.time
 
 /obj/item/modular_computer/proc/get_preset_programs(preset_type)