Backlight Breathing for Planck and Atomic

* Updated personal layouts

* tweaked personal

* Nightly - Audio Cleanup

Refactored the LUTs. Abstracted some of the registers out of audio to
use more functional names. Split audio into audio and audio_pwm. WIP

* nightly - collapsed code

* Added check for note playing to LEDs

* Usability tweaks

* TWEAE

* nightly

added extra kcs to keymap common

* turned on Plank audio

* Added backlight breathing to atomic

* reverted accidental merge

* adds backlight pulse to planck

quantum/audio/audio.c

@@ -374,6 +374,10 @@ bool is_playing_notes(void) {
 	return playing_notes;
 }
 
+bool is_audio_on(void) {
+    return (audio_config.enable != 0);
+}
+
 void audio_toggle(void) {
     audio_config.enable ^= 1;
     eeconfig_update_audio(audio_config.raw);