[Keymap] Add preonic/kjwon15 layout (#6812)

* Add my custom keymap

* Remove del key on left, Add pscr

* Move Audio MOD key to pass ctrl

* Change startup song

* Enable clicky sound

* Swap alt and gui

* Fix semitones

* Add mouse layer

* Change startup song

Additionally, fixup 5 halftones

* Add ctrl key to ctrl+click

* Move media keys to restore raise number keys

* Move mouse key layer switch

* Swap media keys as normal

* Fix music map

* Move mouse speed limit to correct position

* Move prtscr

* Align keycodes

* Add ctrl/esc, swap smart space keys

* Change colemak, dvorak into custom layout

* Fix pure mode (left space)

* Fix mouse mode interrupt

* Add Middle mouse click

* Add Lefthand mouse scroll

* Temporarily disable mouse speed

* Rename custom layout to kjwon15

* Change readme

* Apply suggestions from code review

Co-Authored-By: fauxpark <fauxpark@gmail.com>

* Apply suggestions from code review

* Apply suggestions from code review

Co-Authored-By: fauxpark <fauxpark@gmail.com>

* Update from default keymap's function

keyboards/preonic/keymaps/kjwon15/config.h

@@ -0,0 +1,67 @@
+#pragma once
+
+
+#define TAPPING_TERM 200
+
+/* #define MK_3_SPEED */
+#define MK_MOMENTARY_ACCEL
+#define MOUSEKEY_MAX_SPEED         8
+
+// Must raise 5 halftones
+/* #define CUSTOM_STARTUP \ */
+/*  Q__NOTE(_FS7), \ */
+/*  W__NOTE(_B7), */
+
+#undef MUSICAL_NOTE
+#define MUSICAL_NOTE(note, duration) {((NOTE##note) * 1.3348398541700344), duration}
+
+#define CUSTOM_STARTUP \
+    QD_NOTE(_A6),  \
+    QD_NOTE(_C7),  \
+    QD_NOTE(_A7),  \
+    QD_NOTE(_F7),  \
+    QD_NOTE(_G7),  \
+    HD_NOTE(_C8),
+
+#undef MUSICAL_NOTE
+#define MUSICAL_NOTE(note, duration) {(NOTE##note), duration}
+
+#ifdef AUDIO_ENABLE
+    #define STARTUP_SONG SONG(CUSTOM_STARTUP)
+    // #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)
+
+#define AUDIO_CLICKY
+#define AUDIO_CLICKY_FREQ_DEFAULT 440.f
+
+/*
+ * 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
+

keyboards/preonic/keymaps/kjwon15/readme.md

@@ -0,0 +1,27 @@
+# Kjwon15's Preonic layout
+
+
+## It provides almost full functionality for linux
+
+It has screen capture key which is also used on sysq
+
+
+## Mouse layer
+
+Press left spacebar to activate mouse mode.
+Right hand to move cursor/scroll, Left hand to click
+
+
+## Dual function keys
+
+Right shift is also Enter key. If you press and hold, that key act as shift. But if you tap that key, It is enter key.
+If you want to press and hold enter key, Use left-bottom key. That is pure enter.
+
+## Blank layout
+
+If you want to lock your keyboard, switch to this layout. It also useful when you want to clean your keyboard without disconnecting USB.
+
+
+## Pure mode
+
+Dual function keys are so annoying when you playing game. Then use this layout

keyboards/preonic/keymaps/kjwon15/rules.mk

@@ -0,0 +1,2 @@
+SRC += muse.c
+KEY_LOCK_ENABLE = yes

keyboards/preonic/preonic.c

@@ -12,7 +12,7 @@ const keypos_t hand_swap_config[MATRIX_ROWS][MATRIX_COLS] = {
 #endif
 
 const uint8_t music_map[MATRIX_ROWS][MATRIX_COLS] = LAYOUT_preonic_grid(
-  48, 49, 50, 51, 52, 53, 53, 55, 56, 57, 58, 59,
+  48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59,
   36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
   24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35,
   12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23,