Keymap: Boy_314's Preonic and XD75 Layouts (#3781)

* fixed arrow keys and left control

* added right shift

* latest version

* reverted arrow keys

* edited readme

* added osu layer

* updated osu layout

* updated osu layout

* added full arrow keys to osu layout

* in case i mess up creating macros

* added the best meme key in the world

* added plover steno layer

* updated boy314 layout

* removed unused layers

* added boy314 xd75 layout, inspired by preonic layout

* added boy314 xd75 layout, inspired by preonic layout

* version 2 of boy314's xd75 layout

* added readme notes

* updated readme for boy314 xd75 layout

* qwerty support, brackets on bottom row, caps lock underglow

* fixed readme/

* small changes to allow merging

* minor changes to format

* fixed up default readme

keyboards/preonic/keymaps/boy314/config.h

@@ -0,0 +1,38 @@
+#pragma once
+
+#ifdef AUDIO_ENABLE
+    #define STARTUP_SONG SONG(PREONIC_SOUND)
+    // #define STARTUP_SONG SONG(NO_SOUND)
+
+    #define DEFAULT_LAYER_SONGS { SONG(QWERTY_SOUND), \
+                                  SONG(COLEMAK_SOUND), \
+                                  SONG(DVORAK_SOUND) \
+                                }
+#endif
+
+#define MUSIC_MASK (keycode != KC_NO)
+
+/*
+ * MIDI options
+ */
+
+/* Prevent use of disabled MIDI features in the keymap */
+//#define MIDI_ENABLE_STRICT 1
+
+/* enable basic MIDI features:
+   - MIDI notes can be sent when in Music mode is on
+*/
+
+#define MIDI_BASIC
+
+/* enable advanced MIDI features:
+   - MIDI notes can be added to the keymap
+   - Octave shift and transpose
+   - Virtual sustain, portamento, and modulation wheel
+   - etc.
+*/
+//#define MIDI_ADVANCED
+
+/* override number of MIDI tone keycodes (each octave adds 12 keycodes and allocates 12 bytes) */
+//#define MIDI_TONE_KEYCODE_OCTAVES 2
+