Add ErgoDash keyboard (#3128)

* create ergodash

* Revert "create ergodash"

This reverts commit b261c808c30fee95cb656629f7e9b44b01e79363.

* add ergodash

* keymap→layout

* use set_single_persistent_default_layer

keyboards/ergodash/rev1/rev1.c

@@ -0,0 +1,39 @@
+#include "ergodash.h"
+
+#ifdef AUDIO_ENABLE
+    float tone_startup[][2] = SONG(STARTUP_SOUND);
+    float tone_goodbye[][2] = SONG(GOODBYE_SOUND);
+#endif
+
+#ifdef SSD1306OLED
+void led_set_kb(uint8_t usb_led) {
+    // put your keyboard LED indicator (ex: Caps Lock LED) toggling code here
+    led_set_user(usb_led);
+}
+#endif
+
+void matrix_init_kb(void) {
+
+    #ifdef AUDIO_ENABLE
+        _delay_ms(20); // gets rid of tick
+        PLAY_SONG(tone_startup);
+    #endif
+
+    // // green led on
+    // DDRD |= (1<<5);
+    // PORTD &= ~(1<<5);
+
+    // // orange led on
+    // DDRB |= (1<<0);
+    // PORTB &= ~(1<<0);
+
+	matrix_init_user();
+};
+
+void shutdown_user(void) {
+    #ifdef AUDIO_ENABLE
+        PLAY_SONG(tone_goodbye);
+	_delay_ms(150);
+	stop_all_notes();
+    #endif
+}