[Keymap] Custom preonic layout optimised for programming (#8263)

* my new layout, draft one, untested.

* updated mapping to include more keys

* updated layout name to be more descriptive. Updated readme with more information.

* added more info to the readme and spellchecked it.

* Added the Json for the keyboard layout images and updated the readme to reflect this.

* Updated Image link

Updated Image link so that it links to the correct place

* updated copyright info to include MY name.

* Updated copyright attribuatation to include the author of the file I modified.

* added the backlighting key back to the adjust layer so that it is usable.

* updated the name of the keymap to match my github name.

keyboards/preonic/keymaps/AlexDaigre/config.h

@@ -0,0 +1,37 @@
+#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