[Keymap] planck layout for kifinnsson (#8324)

* [Keymap] kifinnsson keymap for planck

Initial commit for kifinnsson keymap
* placeholder macros
* extend layer

* [Keymap] kifinnsson planck keymap updates

commented out placeholder SEND_STRING macros

* Update keyboards/planck/keymaps/kifinnsson/keymap.c

Remove extern keymap_config_t keymap_config;

Co-Authored-By: James Young <[email protected]>

* Update keyboards/planck/keymaps/kifinnsson/keymap.c

Changed KC_MENU to KC_APP

Co-Authored-By: James Young <[email protected]>

* Removing COLEMAK set_single_persistent_default_layer

as suggested

Co-Authored-By: Drashna Jaelre <[email protected]>

* updated uinit32()_t to layer_state_t() for update_tri_layer_state

as suggested

Co-Authored-By: Drashna Jaelre <[email protected]>

* Removing COLEMAK keycode

Co-Authored-By: Drashna Jaelre <[email protected]>

* Removing COLEMAK keycode in _ADJUST layer

* Update keymap.c

added switch (keycode) back into process_record_user

Co-authored-by: Ki Finnsson <[email protected]>
Co-authored-by: James Young <[email protected]>
Co-authored-by: Drashna Jaelre <[email protected]>

keyboards/planck/keymaps/kifinnsson/config.h

@@ -0,0 +1,39 @@
+#pragma once
+
+#ifdef AUDIO_ENABLE
+    #define STARTUP_SONG SONG(PLANCK_SOUND)
+    // #define STARTUP_SONG SONG(NO_SOUND)
+
+    #define DEFAULT_LAYER_SONGS { SONG(QWERTY_SOUND), \
+                                  SONG(COLEMAK_SOUND), \
+                                  SONG(DVORAK_SOUND) \
+                                }
+#endif
+
+/*
+ * 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
+
+// Most tactile encoders have detents every 4 stages
+#define ENCODER_RESOLUTION 4
+