Add TX Bolt protocol support for Stenography

Requires virtser; Allows QMK to speak the TX BOlt protocol used by stenography machines and software (such as Plover). The upside is that Plover can be configured to listen only to TX Bolt allow the keyboard to switch layers without need to enable/disable the Plover software, or to have a second non-Steno keyboard work concurrently.

quantum/quantum.c

@@ -200,6 +200,9 @@ bool process_record_quantum(keyrecord_t *record) {
   #ifdef AUDIO_ENABLE
     process_audio(keycode, record) &&
   #endif
+  #ifdef STENO_ENABLE
+    process_steno(keycode, record) &&
+  #endif
   #if defined(AUDIO_ENABLE) || (defined(MIDI_ENABLE) && defined(MIDI_BASIC))
     process_music(keycode, record) &&
   #endif
@@ -722,14 +725,14 @@ void backlight_set(uint8_t level)
       //   _SFR_IO8((backlight_pin >> 4) + 2) &= ~_BV(backlight_pin & 0xF);
       // #endif
     #endif
-  } 
+  }
   #ifndef NO_BACKLIGHT_CLOCK
     else if ( level == BACKLIGHT_LEVELS ) {
       // Turn on PWM control of backlight pin
       TCCR1A |= _BV(COM1x1);
       // Set the brightness
       OCR1x = 0xFFFF;
-    } 
+    }
     else {
       // Turn on PWM control of backlight pin
       TCCR1A |= _BV(COM1x1);
@@ -747,7 +750,7 @@ uint8_t backlight_tick = 0;
 
 void backlight_task(void) {
   #ifdef NO_BACKLIGHT_CLOCK
-  if ((0xFFFF >> ((BACKLIGHT_LEVELS - backlight_config.level) * ((BACKLIGHT_LEVELS + 1) / 2))) & (1 << backlight_tick)) { 
+  if ((0xFFFF >> ((BACKLIGHT_LEVELS - backlight_config.level) * ((BACKLIGHT_LEVELS + 1) / 2))) & (1 << backlight_tick)) {
     #if BACKLIGHT_ON_STATE == 0
       // PORTx &= ~n
       _SFR_IO8((backlight_pin >> 4) + 2) &= ~_BV(backlight_pin & 0xF);